SIMATIC C7-623, C7-624 Control Systems Volume 1 ...iii C7–623, C7–624 Control Systems...

Preface, Contents

Teil 1: User Information

Product Overview 1

Teil 2: Installation

Installing and Preparing the C7 2

Configuring the MPI Network 3

Connecting a PG to a C7 4

Teil 3: I/O

C7 Digital Input/Output 5

C7 Analog Input/Output 6

Universal Inputs 7

Maintenance 8

Appendices

General Technical Specifications AGuidelines for Handling Electro-static Sensitive Devices (ESD) B

Glossary, Index

C79000-G7076-C623-01

C7-623, C7-624 Control Systems

Volume 1Installation, Assembly, Wiring

Manual

SIMATIC

iiC7–623, C7–624 Control Systems

C79000 G7076 C623 01

This manual contains notices which you should observe to ensure your own personal safety, as well as toprotect the product and connected equipment. These notices are highlighted in the manual by a warningtriangle and are marked as follows according to the level of danger:

!Warning

indicates that death, severe personal injury or substantial property damage can result if proper precautions arenot taken.

Note

draws your attention to particularly important information on the product, handling the product, or to a particularpart of the documentation.

The device/system may only be set up and operated in conjunction with this manual.

Only qualified personnel should be allowed to install and work on this equipment. Qualified persons aredefined as persons who are authorized to commission, to ground, and to tag circuits, equipment, and sys-tems in accordance with established safety practices and standards.

Note the following:

!Warning

This device and its components may only be used for the applications described in the catalog or the technicaldescription, and only in connection with devices or components from other manufacturers which have beenapproved or recommended by Siemens.

This product can only function correctly and safely if it is transported, stored, set up, and installed correctly, andoperated and maintained as recommended.

!Caution

UL + CSA: Lithium Battery ReplacementDanger of explosion if battery is incorrectly replaced. Replace only with same or equivalent type recommendedby the manufacturer. Dispose of used batteries according to the manufacturer’s instructions.

!Warning

FM–WARNING – DO NOT DISCONNECT WHILE CIRCUIT IS LIVE UNLESS LOCATION IS KNOWN TO BENONHAZARDOUS

SIMATIC and SINEC are registered trademarks of SIEMENS AG.

Third parties using for their own purposes any other names in this document which refer to trade-marks might infringe upon the rights of the trademark owners.

We have checked the contents of this manual for agreement with thehardware and software described. Since deviations cannot be precludedentirely, we cannot guarantee full agreement. However, the data in thismanual are reviewed regularly and any necessary corrections included insubsequent editions. Suggestions for improvement are welcomed.

Technical data subject to change.

Copyright Siemens AG 1995 All rights reserved

The reproduction, transmission or use of this document or its contents isnot permitted without express written authority. Offenders will be liable fordamages. All rights, including rights created by patent grant or registrationof a utility model or design, are reserved.

Siemens AGAutomation GroupIndustrial Automation SystemsP.O. Box 4848, D-90327 Nuremberg

Siemens Aktiengesellschaft C79000-G7076-C623

Safety Guidelines

Qualified Personnel

Correct Usage

Trademarks

iiiC7–623, C7–624 Control SystemsC79000-G7076-C623-01

Preface

The information in this manual enables you to do the following:

Install and wire a C7-623 or C7-624 (Volume 1)

Parameterize the CPU of the C7-623 or C7-624, load a user program intothis CPU and run the program (Volume 2)

Put the C7-623 and C7-624 into operation and use the O/I functions (Vol-ume 2).

The manual is divided to take account of two different types of reader:

Volume 1:Users who carry out the mechanical and electrical installation of the C7 atthe location of use and who bring the C7 to a state of readiness for im-mediate use.

Volume 2:Users who create control programs and O/I configurations, load them intothe C7, and print out screen displays and messages.

The present manual describes the hardware and the software of the C7-623and C7-624. It consists of two volumes.

Volume 1 of the manual covers the following topics:

Installation and preparation of the C7-623 or C7-624

Networking of the C7-623 or C7-624 with programming devices (PGs)and other devices

Connecting the digital and analog I/O

Connecting the I/O to the universal inputs

Connecting the IM361 interface module

Connecting a printer to the C7

Volume 2 of the manual covers the following topics:

Startup (restart) of the C7

Control with the C7 CPU

Addressing and parameterizing the C7 I/O

C7 diagnostics

Using the MMI functions of the C7

Purpose

Audience

Contents of ThisManual

ivC7–623, C7–624 Control Systems

C79000-G7076-C623-01

To make the manual easier to read, the device type description C7-623 orC7-624 will be referred to throughout the manual as C7.

The present manual is valid for the following C7s:

C7 Order Number From Edition

C7-623 6ES7623-1AE00-0AE3 01

C7-624 6ES7624-1AE00-0AE3 01

This manual is available under Order No. 6ES7623–1AE00–8AA0.

The present manual describes the C7-623 and C7-624 fully. For program-ming, expanding and configuring a C7, you require the following furthermanuals:

C7

ProgrammingParameterizing

ConfiguringExpanding

ProTool *)Hardware andInstallation

If required

Statement List forS7-300 and S7-400

Ladder Logic forS7-300 and S7-400

System and StandardFunctions

STEP 7 User Manual

Program Design

ProTool/ Lite *)

orModule specifica-tions

*) Identical functionality in connection with C7.

ConventionsConcerning C7

Scope of ThisManual

C7 Manual

Other PertinentManuals

Preface

vC7–623, C7–624 Control SystemsC79000-G7076-C623-01

Table 1-1 STEP 7 Documentation Package. Order Number 6ES7810–4AA00–8AA0

Manual Contents

Standard Software for S7and M7

STEP 7 User Manual

Provides information for working with the STEP 7 tools

Installation and startup of STEP 7 on PC/programming device

Handling tools with the following contents:

– Managing projects and files

– Configuring and parameterizing the S7-300

– Assigning symbolic names for the user program

– Creating and testing the user program in STL/LAD

– Creating data blocks

– Configuring communications between several CPUs

– Loading, storing and deleting the user program in the CPU/programmingdevice

– Monitoring and forcing the user program (for example, variables)

– Monitoring and forcing the CPU (for example, operating mode, memoryreset, memory compress, protection levels)

Statement List forS7-300/S7-400Programming Manual

or

Ladder Logic forS7-300/S7-400Programming Manual

Reference manual for programming with STL or LAD:

Basics for working with STL/LAD (for example, structure of STL/LAD, numberformats, syntax)

Description of all operations in STEP 7 (with programming examples)

Description of the different addressing possibilities in STEP 7 (with examples)

Description of all integral functions of the CPUs

Description of the CPU-internal registers

System Software forS7-300/S7-400 System andStandard FunctionsReference Manual

Detailed description

of all standard functions (FCs) integrated into STEP 7

of all system functions (SFCs) integrated into the operating system of a CPU

Standard Software for S7

Converting STEP 5Programs Manual

Provides information for converting STEP 5 programs to STEP 7:

Working with the S5/S7 Converter

Rules for converting

The use of converted STEP 5 standard function blocks in STEP 7

Master Index Master index for all the manuals of the documentation package.

Preface

viC7–623, C7–624 Control Systems

C79000-G7076-C623-01

You will find a list of further information sources on the subject of theS7-300 and other programmable controllers in Appendix D of Volume 2 ofthis manual.

Table 1-2 Further Manuals

Manual Contents

System Software for S7-300and S7-400 Program DesignProgramming Manual

Provides basic knowledge for designing STEP 7 programs:

Instructions for the efficient solution of the programming task with the PC/PGand STEP 7

Principle of operation of the CPUs (for example, memory concept, I/O access,addressing, blocks, data types, data management)

Description of STEP 7 data management

Using STEP 7 data types

Using linear and structured programming (with programming examples)

Using block call operations

Overview of the usage of the STEP 7 tools for developing projects (with detailedexamples)

Using the test and diagnostics functions of the CPUs in the user program (forexample, error OBs, status word)

S7-300 Programmable Controller Installation and Hardware

Describes the hardware of the S7-300:

Electrical configuration of the S7-300

Installing the S7-300

Wiring and preparing the S7-300 for operation

Characteristics and technical data of the S7-300 modules

S7-300/M7-300Programmable ControllersModule SpecificationsReference Manual

Describes the hardware of the S7-300 modules:

Analog modules

Digital modules

Interface modules

Characteristics and technical specifications of the S7-300 modules

S7-300 Programmable Con-troller CPU 312 / CPU 314/CPU 315 / CPU 315–DP,Instruction List

Describes the instruction set of the CPU 312, CPU 314, CPU 315 and CPU 315–DPincluding the execution times of all operations.

Other References

Preface

viiC7–623, C7–624 Control SystemsC79000-G7076-C623-01

Table 1-2 Further Manuals

Manual Contents

PG 7xx Describes the programming device (PG) hardware:

Assembly and startup of the PG

Expansion possibilities

Configuring

Fault diagnostics

COROS

ProTool

Manual for creating configurations:

Using ProTool

Configuring

Displays and messages

Loading the configuration into the C7

COROS

ProTool/ Lite

Manual for creating configurations:

Using ProTool/Lite

Configuring

Displays and messages

Loading the configuration into the C7

The manual has the following aids to help you find specific information inthe manual:

At the beginning of the two volumes, you will find a complete directoryof contents.

In each chapter, you will find information on the left-hand column ofevery page giving you an overview of the contents of that section.

After the Appendices, there is a Glossary containing important technicalterms used in the manual.

At the end of the manual, there is a detailed index.

The C7 control system conforms to standards as described in Appendix A.1.

If you have any questions concerning the C7 control system, please contactyour local Siemens representative.

You will find a list of Siemens representatives worldwide in Volume 2 of themanual, Appendix E.

If you have any questions or remarks concerning the manual, please fill inand return the Suggestions/Corrections form at the back of Volume 2.

Structure of ThisManual

Standards

Queries

Preface

viiiC7–623, C7–624 Control Systems

C79000-G7076-C623-01

Preface

ixC7–623, C7–624 Control SystemsC79000-G7076-C623-01

Contents

1 Product Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Installing and Preparing the C7 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 Scope of Supply and C7 Accessories 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 Inserting the Labeling Strips 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 Installing a C7 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4 Arranging the C7 in the Mechanical Environment 2-9. . . . . . . . . . . . . . . . . . . . .

2.5 Electrical Installation 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.6 Setup Guidelines for Interference-Proof Installation 2-16. . . . . . . . . . . . . . . . . . .

2.7 Connecting Shielded Cables 2-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.8 Keying Connectors 2-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.9 Arrangement of Additional S7-300 Modules 2-20. . . . . . . . . . . . . . . . . . . . . . . . .

2.10 C7 Clocks 2-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.11 Starting Up a C7 2-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.12 Status and Fault LEDs on the C7 2-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Configuring an MPI Network 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 Communication Over the MPI 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Special Features of CPs and FMs 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 Rules for Configuring an MPI Network 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 Cable Lengths 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 Network Components 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5 Bus Connectors 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5.1 Bus Connectors 6ES7 972-0B.20-0XA0 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5.2 Bus Connectors 6ES7 972-0B.10-0XA0 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5.3 Plugging the Bus Connector into the Module 3-18. . . . . . . . . . . . . . . . . . . . . . . . .

4 Connecting a Programming Device / PC to a C7 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 Connecting a Programming Device/PC to a C7 4-2. . . . . . . . . . . . . . . . . . . . . .

4.2 Connecting a Programming Device/PC to Several Nodes 4-3. . . . . . . . . . . . .

5 C7 Digital Input/Output 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1 Digital Input Function 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2 Digital Output Function 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3 Status Displays of DI/DO 5-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

xC7–623, C7–624 Control Systems

C79000-G7076-C623-01

6 C7 Analog Input/Output 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.1 Analog Technology 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.2 Connecting Transducers to Analog Inputs 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . 6.2.1 Connecting Voltage and Current Transducers 6-6. . . . . . . . . . . . . . . . . . . . . . . .

6.3 Connecting Loads/Actuators to the Analog Output 6-7. . . . . . . . . . . . . . . . . . . .

6.4 Analog Input Function 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.4.1 Characteristics and Technical Specifications of the Analog Input Module 6-11

6.5 Analog Output Function 6-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 Universal Inputs 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8 Maintenance 8-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.1 Changing and Disposing of the Backup Battery 8-2. . . . . . . . . . . . . . . . . . . . . .

8.2 Replacing the C7 8-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A General Technical Specifications A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A.1 Technical Specifications A-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A.2 Notes on the CE Marking A-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A.3 Notes for the Machine Manufacturer A-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A.4 Transport and Storage Conditions for Backup Batteries A-7. . . . . . . . . . . . . . .

B Guidelines for Handling Electrostatic Sensitive Devices (ESD) B-1. . . . . . . . . . . . . .

B.1 What is ESD? B-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B.2 Electrostatic Charging of Objects and Persons B-3. . . . . . . . . . . . . . . . . . . . . . .

B.3 General Protective Measures Against Electrostatic Discharge Damage B-4.

B.4 Taking Measurements and Working on ESD Modules B-6. . . . . . . . . . . . . . . . .

B.5 Packing Electrostatic Sensitive Devices B-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Glossary Glossary-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Index Index-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents

1-1C7–623, C7–624 Control SystemsC79000-G7076-C623-01

Product Overview

This chapter contains general information concerning the C7-623 andC7-624. A brief overview of the performance range provides you with a firstimpression of the two units.

This chapter also tells which additional components you can connect to a C7.

You require the following accessories to operate the C7:

Programming device (PG) or PC with MPI and programming devicecable.

You must load the following on the programming device or PC

– STEP Tools

– ProTool or ProTool/Lite.

This Chapter

Accessories forOperating the C7

1

1

1-2C7–623, C7–624 Control Systems

C79000-G7076-C623-01

The C7 systems are available in two variants:

Featuring a 4-line display with 20 characters per line and a character heightof 5 mm (see Figure 1-1).

Figure 1-1 C7-623

Overview

C7-623

Product Overview

1


The character height on the display can be changed per software to 4 x 20characters at a character height of 8 mm or 8 x 40 characters at a characterheight of 4.5 mm (see Figure 1-2).

Figure 1-2 C7-624

With the C7 systems you can:

Run user programs that have been programmed in STL or LAD andloaded into the C7 CPU.

Process digital and analog signals using the C7’s integral I/O.

Use interrupt inputs and counters (for purposes including frequency me-tering, period duration measurement).

Load and use MMI applications that you have created using the“ProTool” or “ProTool/Lite” configuring tool.

Use these configurations to monitor and intervene in the process you arecontrolling with the user program.

Output data to a printer.

The C7 has two units that work independently of each other and can commu-nicate with each other over the internally-looped C7 multipoint interface(MPI).

C7 CPU

C7 OP

These parts will be referred to explicitly in the manuals where required.

C7-624

PerformanceRange

C7 Units

Product Overview

1


C79000-G7076-C623-01

In addition to the connections to the process, you can also connect differentcomponents to the C7. The most important components and their functionsare listed in Table 1-1:

Table 1-1 Connectable Components of a C7

Components Function Illustration

Interface module (IM361) ...connects a C7 with an expan-sion rack for S7-300 modules

Signal modules (SMs)(digital input modules,digital output modules,analog input module,analog output module,analog input/output modules)

...pass different process signallevels on to the C7 CPU. Theycan be connected via an IM361.

Function modules (FMs) ...for time-critical and memory-intensive process signal hand-ling tasks, for example, positio-ning or closed-loop control.

Communications processors(CP)

...offloads the CPU of commu-nications tasks, for example,CP 342-5 DP for linking toSINEC L2-DP.

S7-300 (CPU) ...communicates over the MPIwith the C7 and with othernodes on an MPI network.

ConnectableComponents of a C7

Product Overview

1


Table 1-1 Connectable Components of a C7

Components IllustrationFunction

S7-400 (CPU) ...communicates over the MPIwith the C7 and with othernodes on an MPI network.

OP (Operator Panel) ...executes operator interfacefunctions.

PROFIBUS bus cable with busconnector

...connects nodes on an MPI net-work or L2-DP network witheach other.

Programming device cable ...connects a PG/PC with a C7.

Printer ...prints out MMI messages ofthe C7.

Programming device (PG) or PCwith the STEP 7 and ProToolsoftware packages

...configures, parameterizes,programs and tests the C7

RS 485 repeater ...for amplifying the signals inan MPI network or L2-DP net-work, and for linking segmentsof an MPI or L2-DP network.

Product Overview

1


C79000-G7076-C623-01

Figure 1-3 shows some possible connections to other devices and the connec-tion of signal inputs.

➀C7

➂➁

S7-300modules

S7-300

PG

Printer

➀

Digital inputs/outputs

➁ Universal inputs

➂

Analog inputs/outputs

OP 25

Figure 1-3 Some C7 Connection Possibilities

Example

Product Overview


Installing and Preparing the C7

Section Contents Page

2.1 Scope of Supply and C7 Accessories 2-2

2.2 Inserting the Labeling Strips 2-4

2.3 Installing a C7 2-6

2.4 Arranging the C7 in the Mechanical Environ-ment

2-9

2.5 Electrical Installation 2-10

2.6 Setup Guidelines for Interference-Proof Installa-tion

2-16

2.7 Connecting Shielded Cables 2-18

2.8 Keying Connectors 2–19

2.9 Arrangement of Additional S7-300 Modules 2-20

2.10 C7 Clocks 2-22

2.11 Starting Up a C7 2-24

2.12 Status and Fault LEDs on the C7 2-27

This Chapter

2

2


C79000-G7076-C623-01

2.1 Scope of Supply and C7 Accessories

The following components are included in the scope of supply of the C7-623or C7-624:

C7-623 or C7-624

A set of labeling strips (for function keys and softkeys)

Battery

A ground bar

6 shielding clips

1 seal and 4 brackets

Product Information (if required)

The following components can be ordered as C7-specific accessories:

C7-623/C7-624 Control Systems manual comprising two volumes in thelanguages: German: 6ES7 623-1AE00-8AA0English: 6ES7 623-1AE00-8BA0French: 6ES7 623-1AE00-8CA0Italian: 6ES7 623-1AE00-8DA0Spanish: 6ES7 623-1AE00-8EA0

Labeling strips for function keys and softkeys 6ES7 623-1AE00-1AA00

Service package (seal and 4 brackets) 6ES 623-1AE00-3AA00

Plug connectors for C7 I/O with coding keys and coding sliders6ES7 623-1AE00-4AA0

Backup battery 6ES 623-1AE00-5AA00

The following components can be ordered as important standard accessoriesfor the C7:

Programming device cable 6ES7 901-0BF00-0AA0 (for connecting theC7 to the PG)

PC/MPI cable, 5 m 6ES7 901-2BF00-0AA0

IM cable (for connecting additional S7-300)

IM cable, 1 m 6ES7 368-3BB00-0AA0

IM cable, 2.5 m 6ES7 368-3BC51-0AA0

IM cable, 5 m 6ES7 368-3BF00-0AA0

IM cable, 10 m 6ES7 368-3CB00-0AA0

Parts Supplied

Accessories


2


Printer cable (for V.24 serial interface) 6XV 1440-2C... (max. 16 m)

The following applies for the length key:

6XV1440-2C

Multiplier 0.01 m0.1 m1.0 m

10.0 m100.0 m

EHNTU

111122345668

Length digit 101215162025324050606380

025605200030


2


C79000-G7076-C623-01

2.2 Inserting the Labeling Strips

The function keys and softkeys are labeled using labeling strips which areinserted into the keypad from the side.

The labeling as supplied is as follows:

The function keys of the C7-623 are labeled with K1...K8 and K9...K16and the softkeys are labeled with F1...F4.

The function keys of the C7-624 are labeled with K1...K8 and K9...K16and the softkeys are labeled with F1...F8.

A set of blank labeling strips are enclosed with the C7. They can be used forplant-specific labeling of the C7.

!Caution

The writing on the strips must be wipe-resistant before inserting. A keypadmembrane soiled on the inside cannot be cleaned and can only be replacedin the factory.

A sheet with plant–specific labelling strips is also provided. The strips mustbe cut off exactly along the marked line. If the labelling strips are too large,they cannot be inserted into the keyboard.

Labeling strips can only be changed when the C7 is not installed. The sealingring should be replaced. Proceed as follows:

Step Action

1. Cut off the corners of the labelling strip that are marked with a ➀

C7–623 K1...K8

➀

2. If possible, hold the labelling strip at the end you want to insert in the slit.Hold the strip horizontally. Hold the strip by touching both surface areasrather than the edges to facilitate insertion.

3. Slide the strips into the slits provided. The location of the slits is shown inFigure 2-1.The strips are slid over the existing labeling.

4. To avoid bending the strip as you insert it, move it backward and forwardseveral times .

Labeling Strips

Plant–SpecificLabelling


2


Figure 2-1 Inserting Labeling Strips


2


C79000-G7076-C623-01

2.3 Installing a C7

The C7 has been prepared for fixed installation in a switching panel or cabi-net door. Proceed as follows:

Step Action

1. Make a standard cutout in the switching panel in accordance with DIN43700 (dimensions 230,5 x 158,5 mm).

2. Insert the enclosed sealing ring behind the front panel (see Figure 2-2).

3. Insert the C7 in the cutout in the switching panel.

4. Insert the 4 fixing brackets (see Figure 2-4 ➀ ) into the guides provided. Pushthe fixing brackets in until the spring engages.

5. Screw the 4 fixing screws enclosed with the C7 into the 4 fixing bracketsenclosed (see Figure 2-5 ) (approximately. 2 to 3 turns).

6. Tighten the 4 screws lightly with a screwdriver.

Insert sealing ring here

Figure 2-2 Inserting the Sealing Ring

168

24069

230,5+0,5

158,5+0,5

Cutout in front panel

Figure 2-3 Dimension Drawings for the C7

Installation


2


➀

Figure 2-4 Fixing Bracket Before Engaging

Figure 2-5 Fixing Bracket Engaged, with Screw

Fixing BracketBefore Engaging

Fixing BracketEngaged


2


C79000-G7076-C623-01

Proceed as follows when loosening the fixing bracket:

Step Action

1. Loosen screw.

2. Lift fixing bracket (➀ in Figure Bild 2-6).

3. Push fixing bracket out of guide (➁ in Figure 2-6).

➁

➀

Figure 2-6 Loosening the Fixing Bracket

Loosening the Fixing Bracket


2


2.4 Arranging the C7 in the Mechanical Environment

When installing a C7, please note the following:

The switching panel may be 1 to 4 mm thick. Make sure the sealing ringfits tight at all spots.

A gap of 50 to 70 mm to a housing wall must be observed on the sides ofthe C7 as shown in Figure 2-7.

The sealing ring on the frontplate must sit perfectly.

The tabs of the insertion strips must not be caught.

The C7 must be protected from direct sunlight.

50

50

70 70

Figure 2-7 Gap Dimensions to be Adhered to when Installing the C7

Arranging the C7


2


C79000-G7076-C623-01

2.5 Electrical Installation

The plug and socket connectors (interfaces) required for connecting the vari-ous inputs and outputs of the C7 are provided.

AUX digital inputsIMinterface

Serial interfaceV.24(e.g. for printer)

Analog inputs/Analog outputs

Digital inputs (top)

24 VDC power supplyDI/DO

Digital outputs (bottom)Top

Bottom

Left

Right

Figure 2-8 A view of the C7 with External I/O Interfaces

Tables 2-1 to 2-6 show the pin assignments for the following C7 connectors.

Table 2-1 Pin Assignments of the Digital Inputs

Pin No. Signal Explanation

0.0 I0.0 Digital input 0










Overview

C7 PinAssignments

Digital Inputs


2


Table 2-1 Pin Assignments of the Digital Inputs

Pin No. ExplanationSignal







Table 2-2 Pin Assignments of the Digital Outputs

Pin No. Signal Explanation

0.0 Q0.0 Digital output 0
















Digital Outputs


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C79000-G7076-C623-01

Table 2-3 Pin Assignments of the Analog Inputs/Outputs

Pin No. Explanation

AI1-U Analog input 1, signal input for voltage

AI1-I Analog input 1, signal input for current

AI1-M Analog input 1, reference potential










MANA Reference potential of analog measuring circuit

AO-U Analog output, signal output for voltage

AO-I Analog output, signal output for current

AO-M Analog output, reference potential

Table 2-4 Pin Assignments of the Universal Inputs

Pin No. Explanation

M Relevant ground

DI-X1 Universal input 1 (digital input, interrupt input or counter input)

DI-X2 Universal input 2 (digital input, interrupt input or counter input)

DI-X3 Universal input 3 (digital input, interrupt frequency or period durationcounter input)

DI-X4 Universal input 4 (interrupt input or digital input)

– Not connected

– Not connected

– Not connected

Analog Inputs/Outputs

AUX Digital Inputs(Universal Inputs)


2


Table 2-5 Pin Assignments of the Power Supply DI/DO

Pin No. Explanation

1L+ 24-volt supply for DI 0.0...1.7

1M Relevant ground for DI 0.0...1.7

2L+ 24-volt supply for DQ0.0...DQ0.7 (approx. 2 A)


2M Relevant ground for DQ0.0...DQ0.7

3L+ 24-volt supply für DQ1.0...DQ1.7 (approx. 2 A)


3M Relevant ground for DQ1.0...DQ1.7

Table 2-6 Pin Assignments for the V.24 Serial Interface (e.g. forPrinter)

Pin No. Explanation

1 C7-M (reference potential)

2 --

3 RxD

4 TxD

5 CTS

6 --

7 --


9 --

10 RTS

11 --


13 --

14 --


DI/DO 24 VDCPower Supply

V.24 SerialInterface


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C79000-G7076-C623-01

MPI (Multipoint interface)

24 VDC inputauthor.

Functional Earth

Figure 2-9 C7 View with MPI and C7 Power Supply

24 VDC input (C7 power supply)

Pin No. Explanation

1 NC

2 M24V

3 RS485 line B

4 RTSAS

5 M5V

6 P5V

7 P24V

8 RS485 line A

Pin No. Explanation

1 L+

2 M (ground M24V)

3 A+ (authorization input)

4 AE (authorization input)

Connect the functional ground terminal (see Figure 2-8) to cabinetground using a cable lug and a cable with a minimum cross–section of 4 mm.

MPI

Functional Earth


2


You can use the following cables for connecting the C7 to other devices:

Table 2-7 Cables for Connecting to the C7

Connecting Cable Length Special Features Illustration ConnectionBetween ...

MPI

Programming device cable 5 m – C7 PGC7 S7-300C7 S7-400

PROFIBUS bus cable(interior cable/direct-buried cableand bus connectors(without programming port/with programming port)and PROFIBUS bus terminal RS 485(with 1.5 m cable, with 3 m-cable, with programming port) and 1.5 mcable

– User must pre-pare cable

C7 PGC7 C7C7 S7-300C7 S7-400

V.24 serial interface

Serial interface (printer cable)For Siemens printersDR210/211/2303/231-N

See CatalogST80.1

C7 Printer

IM361

IM361 cable – C7 additionalI/O (S7-300)

C7 I/O connections

Connectors for C7 I/O

Cable diameter

16 pin8 pin4 pin

0,2...2,5 mm2

C7 externalsensors

C7 DeviceConnections


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C79000-G7076-C623-01

2.6 Setup Guidelines for Interference-Proof Installation

An automation system must be shielded to prevent interference.

When a system is poorly groundet or not shielded, low-frequency and high-frequency interference signals can penetrate the internal bus of the PLC andcause malfunctions.

Interference signals can also be caused when relays or contactors switch(very rapid changes in current or voltage; high-frequency interference si-gnals) or when two parts of a system have different grounding potentials(low-frequency signals).

Use only shielded cables for all signal connections.

Ground the shields of cables on two sides for

– cables to the PLC,

– bus cables,

– cables to I/O devices.

The standard cables specified in the ST80.1 catalog meet these require-ments.

Screw down or lock all plug connections.

Do not install signal lines parallel to power lines. Use a separate cableduct located at least 50 cm from power lines.

Install devices which could bring in interference signals from the outside atthe bottom of the cabinet. Place the grounding rail directly at the cabinet en-trance so that cables which could be carrying interference signals can be ap-plied directly to grounding potential. Apply all shielded lines with the shieldhere. Apply only the outer shield of double-shielded signal lines here.

Install long signal lines along the cabinet walls. Setting up the cabinet in ac-cordance with EMC guidelines is an important factor in the reduction of in-terference. All grounding connections in the cabinet must have large cablecross sections and be applied over a large surface.

Insulate analog devices in the switching cabinet and ground them to a singlepoint in the cabinet using copper tape.

Always use equivalent metals for the materials. Never use aluminum (dangerof oxidation).

Connect all doors and metal parts (sides, back and cover) of the cabinet atleast three times to the cabinet frame (short, paint-free, large-area connec-tions).

Overview

Use and Installa-tion of Interfe-rence-Proof Cables

Cabinet setup


2


Note

If your system generates high electrostatic voltages (for example, textile ma-chines and special construction machines), run the grounding lines of themachine parts carrying interference signals to a separate operating groundisolated from the central grounding point of the cabinet (surface groundingwith housing construction, reinforcement).


2


C79000-G7076-C623-01

2.7 Connecting Shielded Cables

This section describes how to connect the shield of shielded signal lines toground. The ground connection is made by directly connecting the shieldwith the ground terminal of the C7.

Proceed as follows to install the grounding bar and shielding clips suppliedwith the C7:

1. Unfasten the two screws on the C7 as shown in Figure 2-10.

2. Position the grounding bar as shown in Figure 2-10 and fix this in placewith the previously removed screw.

3. Affix the shielding clips to the grounding bar as shown in Figure 2-10.

4. Press the insulated cable into these shielding clips in such a way as toachieve optimal contact of the cable shield.

Shielding clip

Scale 1:1

Figure 2-10 C7 with Grounding Bar and Shielding Clips

Overview

Procedure


2


2.8 Keying Connectors

A set of connectors with solid and profiled coding keys can be ordered as C7accessories (see Section 2.1 under Accessories). The keying of connectorswill be described in the following:

The solid coding keys ➀ and profiled coding keys ➁ (see Figure 2-11) pre-vent a connector from being confused with another without polarity reversal.

Proceed as follows:

1. Insert the solid coding key ➀ into the notches provided on the connectorpart ❶ .

2. Insert the profiled coding key ➁ into the respective cutouts on the housingpart ❷ .

Solid and profiled coding keys that face each other prevent the connectorfrom being plugged in.

The connector can be plugged in if solid and profiled coding keys do not faceeach other.

12

34

56

78

910

➀

❶

❷

➁

Figure 2-11How to Key Connectors.

Overview

KeyingConnectors


2


C79000-G7076-C623-01

2.9 Arrangement of Additional S7-300 Modules

You can connect further S7-300 modules to the C7 via the IM360 interface ofthe C7.

The manual /30/ describes how to install S7-300 modules

An IM 361 module of the S7-300 system must be connected to the C7.

You connect the additional I/O as follows:

1. Install the additional I/O as described for racks 1 to 3 in the manual /70/.

2. Connect the C7 to the IM361 via the IM standard cable (see also Figure2-8 for connecting the C7).

When the C7 is first started up, it detects the additional connected modules.

The C7 has an integral IM360 interface module for I/O expansion with exter-nal S7 standard I/O. This interface module is characterized by the followingfeatures:

Data transmission from the IM360 to the IM361 of the first rack expan-sion via 368 connecting cable

Maximum distance between IM360 and IM361: 10m

You can expand your C7 by up to 3 mounting racks using the IM360 inter-face module.

Additional S7-300Modules

Prerequisite

Connecting theAdditional I/O

IM 360 InterfaceModule


2


368 connecting cable



2 3 4 5 6 . . . 11

Modules

3 4 5 6 7 8 9 10 11

3 4 5 6 7 8 9 10 11

Slot number 3 4 5 6 7 8 9 10 11

Slot number

Slot number

Slot number

Modules

Modules

Customer-specific module

IM-361

.

IM-361

IM-361

Figure 2-12 Maximum Configuration of the Slots of a C7


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C79000-G7076-C623-01

2.10 C7 Clocks

The C7 systems have two clocks:

One clock in the C7 CPU

One clock in the C7 OP section

The clock in the C7 CPU is an integral “real-time clock” (hardware clock).This clock is independent of the clock of the MMI section of the C7 OP.

The clock is supplied with the following value set:DT#1994-01-01-00:00:00.

As an integrated clock, the C7 CPU clock can also function as the masterclock within the C7 I/O configuration (see also Section 3.4.6 in Volume 2).

You can set and read the clock in the following ways:

With the programming device (PG) using the STEP 7 tool S7 Info

or

In the user program with SFC0 “SET_CLK”. With SFC1 “READ_CLK”,you can read the current time of day (see the reference manual /235/).

There are two situations influencing the clock response to POWER OFF:

If the C7 has a backup battery, the clocks of the C7 continue to run atPOWER OFF.

If the C7 has no battery backup, clocks of the C7 continue at POWER ONwith the time shown at POWER OFF. Since the C7 is not backed up, theclock will also not continue after POWER OFF.

The clock in the C7 OP section is independent of the clock in the C7 CPU.

The clock is supplied with the following value set:01.01.94 -00:00.

The clock time:

Can be set during configuration (for example, it is loaded from C7 CPUdata)

Can be read on-line by operator input if the special display “Clock time/Date” has been configured and selected (see Volume 2, Section 6.7.1).

Overview

Clock in the C7CPU

Setting the C7 CPUClock

Master Clock

Setting andReading the Clockin the ControlSection

Clock at Power Off

Clock in C7 OPSection

Setting the MMIClock

Setting andReading the Clockin the C7 OPSection


2


The C7 CPU provides you with an operating hours counter.

You can use this to keep count of the operating hours of the C7 CPU or ofany controlled equipment.

You program the operating hours counter in the user program with the SFCs2 “SET_RTM”, 3 “CTRL_RTM” and 4 “READ_RTM” (see the referencemanual /235/).

Operating HoursCounter


2


C79000-G7076-C623-01

2.11 Starting Up a C7

The C7 must be switched off. Proceed as follows when clearing the C7 OPsection:

Press and hold the keys

simultaneously

Switch on the power supply to the C7.

The C7 OP section is now cleared, that is, the C7 OP has been reinitializedand the entire configuration has been deleted.

Clearing the C7 CPU means reinitializing the C7 CPU, deleting the currentcontrol program and reloading any user program located in the flash memoryof the C7 CPU.

There are two methods of clearing the C7 CPU:

Clearing with the C7 system function “Operating modes” of the C7

Clearing with the PG function (see programming device manual)

Clearing with the PG function is only possible when the C7 CPU is at STOP

The following is a description of how to clear the C7 CPU using the systemfunction “C7 CPU Control modes”:

1. Select the System Function Menu by pressing the

keys

Clearing the C7 OP

Clearing the C7CPU

Clearing the C7CPU with theSystem Function


2


The following menu is displayed:

= Anwahl der DIR–Funktion

SYSTEM FUNCTIONS

KEY DI/DO

SIMATIC C7

KEY DI/DO

Figure 2-13 System Function Menu with Associated Function Keys

2. Select the C7 CPU Modes as follows:

C7-623: By pressing or



2


C79000-G7076-C623-01

The following menu is displayed:

= Anwahl der DIR–Funktion

MODE: STOP

RUNP RUN STOP MRES

RUNP RUN STOP MRES

Figure 2-14 “C7 CPU Modes” Menu with Associated Function Keys

3. Select the STOP function by pressing the relevant function keys. TheSTOP indicator lights up.

4. Select the MRES (memory reset or clear) function and wait until theSTOP LED lights up again (approximately 3 seconds).

Result: The STOP indicator goes out and then lights up again afterapproximately 3 seconds.

5. Immediately after the STOP indicator lights up again: Select STOP withthe relevant function keys and then initiate MRES again.

Result:

– If the STOP indicator blinks for approximately 3 seconds and thenlights up again: everything is OK; the C7 CPU has been cleared.

– If the STOP indicator of the C7 does not blink or other indicators lightup or blink (exception: BAF indicator): repeat steps 4 and 5; if neces-sary, evaluate the diagnostics buffer of the C7 using the programmingdevice.

– If the BAF and SF indicators on the C7 light up, the backup battery ismissing. If a battery is nevertheless inserted, you must look for addi-tional error entries in the diagnostics buffer of the C7.

6. After a memory reset, you must explicitly set the C7 CPU to STOP orRUN/RUNP since the C7 CPU is still set to MRES.


2


2.12 Status and Fault LEDs on the C7

The C7-623/C7-624 has the following status and fault LEDs:

SF

BAF

DC5V

FRCE

RUN

STOP

Figure 2-15 Status and Fault LEDs of the C7-623 / C7-624

The status and fault LEDs are explained in the order in which they are ar-ranged on the C7.

Display Meaning Explanation

SF (red) C7 CPU group error Lights up in the event ofei

Hardware faults

Firmware errors

Programming errors

Parameter assignment error

Arithmetic errors

Timer errors

Defective internal memory

Battery failure or no backup on POWER ON

I/O fault/error in the internal I/O functions

You must use a programming device and read out the contentsof the diagnostic buffer to determine the exact nature of the er-ror/fault.

BAF (red) Battery fault Lights up if the battery

has too little voltage

is defective

is not inserted.

5VDC (green) 5VDC supply for C7 Lights up if the internal 5 V voltage is O.K.

FRCE (yellow) Reserved –

RUN (green) RUN mode of the C7CPU

Lights up if the C7 is executing a user program.

Flashes (2 Hz) during C7 restart (the STOP LED also lights up; after theSTOP LED goes dark, the outputs are enabled).

STOP (yellow) RUN mode of the C7CPU

Lights up if the C7 is not executing a user program.

Flashes at 1-second intervals if the CPU requests a memory reset.

Status and FaultLEDs

Meaning of theStatus and FaultLEDs


2


C79000-G7076-C623-01



Configuring an MPI Network

This chapter describes how to configure an MPI network. You will learn thefollowing:

Which communication possibilities are open to you with an MPI network

To which components you connect the nodes of an MPI network

Which cable lengths you can implement

How you can connect the PROFIBUS bus cable to the bus connector

How to use an RS 485 repeater

What to remember when connecting a programming device

You must assign MPI addresses to the individual nodes of an MPI network inorder to enable them to communicate with each other. How you assign theMPI addresses and what rules you must observe are described in the usermanual /231/.

In Volume 2 of the manual, Section 3.4.10, you will find all C7 CPU-specificdata that you require for configuring communication.


3.1 Communication Over the MPI 3-2

3.2 Rules for Configuring an MPI Network 3-4

3.3 Cable Lengths 3-8

3.4 Network Components 3-10

3.5 Bus Connectors 3-12

3.5.1 Bus Connectors 6ES7 972-0B.20-0XA0 3-13

3.5.2 Bus Connectors 6ES7 972-0B.10-0XA0 3-16

3.5.3 Plugging the Bus Connector into the Module 3-18

This Chapter

3

3


C79000-G7076-C623-01

3.1 Communication Over the MPI

The interface of the C7 for connecting, for example, programming devices, iscalled multipoint interface since several devices can communicate with theC7 over this interface (that is, communication can take place from severalpoints).

The baud rate of the C7 is permanently set to 187.5 kbps

You can connect the following devices to the MPI:

Programming devices (PGs/PCs)

Operator interface systems (OPs)

S7-300 / M7-300

S7-400 / M7-400

Further C7s

FMs/CPs

Convention: In the following, all devices that you connect in an MPI networkare called nodes. Please note that the C7 occupies two MPI addresses andtherefore consists internally of two nodes.

A segment is a bus line between two terminating resistances. A segment cancontain up to 32 nodes.

You can connect up to 126 (addressable) nodes via the MPI.

You must assign an “MPI address” and a “highest MPI address” to each nodeto enable all nodes connected via the MPI to communicate with each other.

Note

The RS 485 repeater has no “MPI address”.

Definition:MultipointInterface MPI

Baud Rate

ConnectableDevices

Device / Node

Segment

Number of Nodes

MPI Addresses


3


The following table shows the default MPI addresses with which the devicesare supplied.

Node (Device) DefaultMPI Address

Highest Default MPI Adress

PG 0 15

C7 OP 1 15

C7 CPU 2 15

Please observe the following rules before assigning MPI addresses:

All MPI addresses in an MPI network must be different

The highest possible MPI address must be > the largest actual MPI ad-dress and must be the same for all nodes. (Exception: Connecting a pro-gramming device to several nodes; see Chapter 4).

CPs and FMs (as customized modules or in expansion racks) with their ownMPI address have the following special feature: Their MPI address is deter-mined automatically by the C7 and assigned in accordance with the follow-ing system:

MPI-C7 address(1 for C7-OP 2 for C7-CPU)

MPI addr.C7-CPU+1

MPI addr.C7-CPU+2

C7 CP CPIM361

Figure 3-1 Automatic Assignment of MPI Addresses for CPs and FMs

A C7 CPU can communicate with up to four C7 CPUs or S7-300 CPUs. Theycan exchange global data.Please refer to /231/ for detailed information on global data.

Sending and receiving of global data is organized in GD circuits. Each C7CPU may participate in up to four different GD circuits.

Default MPIAddresses of theC7

Rules for the MPIAddresses

Special Featuresof CPs and FMs

CPU-CPU Communication

GD Circuit


3


C79000-G7076-C623-01

3.2 Rules for Configuring an MPI Network

In this section you will be shown

how to configure an MPI network

which rules you must observe.

You must observe the following rules when connecting the nodes of an MPInetwork:

Before you interconnect the individual nodes of the MPI network, youmust assign the MPI address and the highest MPI address to each node(with the exception of the RS 485 repeater).

Tip: Mark all nodes in an MPI network with the MPI address on theirhousings. In this way, you can always see which node has been assignedwhich MPI address in your system.

Connect all nodes in the MPI network as shown in Figure 3-5; that is,integrate the stationary programming devices and OPs direct in the MPInetwork.

Connect only those programming devices/OPs that are required forstartup or maintenance via spur lines to the MPI network.

If you are operating more than 32 nodes in a network, you must link thebus segments via RS 485 repeaters.

Ungrounded bus segments and grounded bus segments are connected viaRS 485 repeaters.

Each RS 485 repeater used reduces the maximum number of nodes perbus segment. This means, if there is an RS 485 repeater in a bus segment,there can then only be a maximum of 31 further nodes in the bus segment.The number of RS 485 repeaters has no effect on the maximum numberof nodes on the bus.

There can be up to 10 segments in one row.

Switch the terminating resistance on at the geographical end point of theMPI network (see Section 3.3).

Before you insert a new node into the MPI network, you must switch offits supply voltage.

Overview

Rules


3


The MPI addresses set at the factory should not be assigned as fixed nodeaddresses since, otherwise, address conflicts (double MPI addresses) canarise when devices are replaced or the network is expanded.

Reserve the MPI address “0” for a service PG

Reserve the address “1” for the C7 OP

Reserve the address “2” for the C7 CPU

This avoids double assignment of MPI addresses after installing a furtherpreset C7 or S7-300 in the MPI network (for example, when replacing a C7).

You connect the individual nodes via the bus connectors and the PROFIBUSbus cable. Remember to provide for the nodes a bus connector with PGsocket to which a PG can be connected if required (see also Section 3.5).

Use the RS 485 repeater for connections between segments or for extendingcables.

See the reference manual /71/ for details of how to install and use a repeater.

A cable must be terminated with a surge impedance. For this purpose, switchon the terminating resistance at the first and last node of the network.

At least one of these two nodes must be supplied with power.

Figure 3-2 shows you where to connect the terminating resistance on the busconnector.

on

off

Terminatingresistanceswitched off

on

off

Terminatingresistanceswitched on

Figure 3-2 Terminating Resistance on the Bus Connector

Recommendationfor MPI Addressesin the Network

Components

Using the RS 485Repeater

TerminatingResistance

TerminatingResistance On BusConnector


3


C79000-G7076-C623-01

Figure 3-3 shows you where to connect the terminating resistance on the RS485 repeater.

DC24V

L+ M PE M 5.2

A1 B1 A1B1

A2B2A2B2

SIEMENSRS 485-REPEATER

ON

ONTerminatingresistance Bus segment 1

TerminatingresistanceBus segment 2

Figure 3-3 Terminating Resistance on the RS 485 Repeater

Using a possible MPI network configuration, Figure 3-4 shows where youmust connect the terminating resistance.

RS 485repeater

➀

➀

➀

➀ Terminating resistance switched on

S7-300 S7-300

C7

Spur line

S7-300

➀

OP 25 OP 25

PG

PG*

* Only connected via spur line at startup or during service work

Figure 3-4 Switching Terminating Resistances into an MPI Network

TerminatingResistance On RS485 Repeater

Example ofTerminatingResistance in MPINetwork


3


Figure 3-5 shows the principle of configuring an MPI network according tothe rules listed above.

S7-300 S7-300

S7-300S7-300

* Only connected via spur line at startup or during service work

S7-300

PG*

0

14

0 ... x MPI addresses of the nodes

10111213

5 6 7 8+93 + 4

OPOP

C7 C7PG

Figure 3-5 Example of an MPI Network

Example for anMPI Network


3


C79000-G7076-C623-01

3.3 Cable Lengths

You can implement cable lengths up to 50 m in a segment of an MPI net-work. The 50 m applies from the 1st node to the last node of the segment.

If you implement longer cable lengths than those permissible in one segment,you must use RS 485 repeaters. The possible maximum lengths between twoRS 485 repeaters correspond to the cable length of a segment. However,when using these maximum cable lengths, please note that there must be noother node (remote segment) between the two RS 485 repeaters. You canconnect up to nine RS 485 repeaters in series.

When calculating the total number of nodes to be connected, please note thatan RS 485 repeater counts as a node of the MPI network, even if it has notbeen assigned its own MPI number.

Figure 3-6 illustrates the principle of “cable extension” with RS 485 repeat-ers for the MPI.

C7

50 m 1000 m 50 m

RS 485-repeater

PROFIBUS bus cable

(”Remote segment)

Figure 3-6 Maximum Cable Length Between Two RS 485-Repeaters

Spur lines are cables with which you can connect programming devices orOPs to a network for startup or service purposes. Spur lines should be asshort as possible. They are restricted in their length and number.

Thefollowing Table shows the maximum permissible lengths of spur lines ina segment.

Table 3-1 Maximum Permissible Length of Spur Lines in a Segment

Baud Rate Max. Perm.Length of SpurLi i S t

Number of Nodes for a SpurLine Length of ...

Lines in Segment 1.5 m or 1.6 m 3 m

187.5 kbaud 75 m 32 25

Segment in MPINetwork

Longer CableLengths

Spur Lines


3


Figure 3-7 shows a possible MPI network configuration. The example indi-cates the maximum possible distances in an MPI network.

RS 485repeater

RS 485repeater

max. 50m

max. 50m

max.1000m

➀

➀

➀

➀

➀

➀

➀ Terminating resistance switched on

C7

S7-300 S7-300

S7-300 S7-300

Spur line➁

➁ PG connected for maintenance purposes via spur line

0

12

0 ... x MPI addresses of the nodes

8

91011

3+4 5 6 7

OP 25

PG

PG

OP 25

OP 25

”Rem

ote

Seg

men

t”Figure 3-7 Cable Length in an MPI Network

Example


3


C79000-G7076-C623-01

3.4 Network Components

You require network components...

Table 3-2 Network Components

Purpose Components

... for building a network PROFIBUS bus cable

... for connecting a node to the net-work

Bus connector

... for amplifying the signal

... for linking segments

RS 485 repeater

... for converting the signal to fiber-optic transmission (PROFIBUS-DPnetwork only)

Optical Link Module

... for connecting programming de-vices/OPs to the network

Programming device cables (spurlines)

We offer the following PROFIBUS bus cables:

Table 3-3 Bus Cables

PROFIBUS bus cable 6XV1 830-0AH10

PROFIBUS direct-buried cable 6XV1 830-3AH10

PROFIBUS drum cable 6XV1 830-3BH10

PROFIBUS bus cable with PE sheath (for foodand drinks industry)

6XV1 830-0BH10

PROFIBUS bus cable for festooning 6XV1 830-3CH10

The PROFIBUS bus cable is a two-core, twisted and shielded cable with thefollowing characteristics:

Table 3-4 Characteristics of the PROFIBUS Bus Cable

Features Values

Surge impedance Approx. 135 to 160 Ω (f = 3 to 20MHz)

Loop resistance 115 Ω/km

Operating capacitance 30 nF/km

Attenuation 0.9 dB/100 m (f = 200 kHz)

Permissible core cross-section 0.3 mm2 to 0.5 mm2

Permissible cable diameter 8 mm 0.5 mm

Purpose

PROFIBUS BusCable

Characteristics ofthe PROFIBUS BusCable


3


When laying the PROFIBUS bus cable, you must not

twist it,

stretch it or

press it.

In addition, when laying the interior bus cable, you must observe the follow-ing boundary conditions (dA = outer diameter of the cable):

Table 3-5 Boundary Conditions when Laying the Interior Bus Cable

Features Edge Conditions

Bending radius when bent once 80 mm (10dA)

Bending radius when bent several times 160 mm (20dA)

Permissible temperature range when laying – 5 C to + 50 C

Storage and stationary operating temperature – 30 C to + 65 C

Rules for CableLaying


3


C79000-G7076-C623-01

3.5 Bus Connectors

The bus connector is used for connecting the PROFIBUS bus cable to theMPI. This is how the connection to further nodes is established.

There are two different bus connectors:

Up to 12 Mbaud

– Without heavy-gauge threaded joint (6ES7 972-0BA10-0XA0)

– With heavy-gauge threaded joint (6ES7 972-0BB10-0XA0)

Up to 12 Mbaud, optionally with vertical or angular outgoing cable

– Without heavy-gauge threaded joint (6ES7 972-0BA20-0XA0)

– With heavy-gauge threaded joint (6ES7 972-0BB20-0XA0)

The bus connectors are not required for the RS 485 repeater:

Purpose of theBus Connector

No Application


3


3.5.1 Bus Connectors 6ES7 972-0B.20-0XA0

Figure 3-8 shows the bus connector 6ES7 972-0B.20 ...:

Screws for fixingat station

Programming devicesocket (only with 6ES7972-0BB20-0XA0)

9-pin sub D connectorfor connection to station

Housing screw

Switch for terminating resistance

Clamp-type hinge for vertical or 30°outgoing cable

Figure 3-8 Design of Bus Connector 6ES7 972-0B.20 ...

Connect the bus cable to the bus connector 6ES7 972-0B.20 ... as follows:

1. Strip the insulation off the bus cable as shown in Figure 3-9.

Design(6ES7-972-0B.20 ...)

Mounting the BusCable


3


C79000-G7076-C623-01

5,5

11

13

2

A B

5,5

6

7,3

2

A B

5,5

5,5

4

4,3

2

A B 5,5

5,3

2

A B

with programmingdevice socket

5,5

5

2

A B 5,5

5,3

2

A B

5,5

7

8

2

A B

with programming device socket

5,5

11

13

2

A B

Outgoing cable, vertical

without programming device socket

Outgoing cable, angular

without programming device socket

Figure 3-9 Length of Stripped Insulation for the Connection to the Bus Connector6ES7 972-0B.20 ...

2. Open the housing of the bus connector by loosening the housing screwand swinging the cover upward.

3. Remove the clamp-type hinge cover.

4. The bus connector 6ES7 972-0B.20 is delivered prepared for an angularoutgoing cable.

If a vertical outgoing cable arrangement is required

– loosen the screw at the left side of the hinge,

– slightly lift the hinge and

– turn the hinge inward.

– For fixing the hinge, tighten the screw on the left.


3


5. Insert the green and red wires into screw-type terminal block as shown inFigure 3-10.

Make sure that you always connect the same wires at the same terminal.A or B (for example, always connect green wire to terminal A and redwire to terminal B).

Bus cable connection for firstand last station on the bus1

Bus cable connection for allother stations on the bus

1 The bus cable can either be connected right or left!

A B A B A B A B

ÇÇÇÇ

Figure 3-10Connecting the Bus Cable at the Bus Connector (6ES7 972-0B.20 ...)

6. Screw tight the clamp-type hinge cover.

Make sure that the shielding is bare under the screw-type terminal.

7. Tighten the green and red wires in the screw-type terminal.

8. Close the cover of the bus connector and

9. Screw down the housing.


3


C79000-G7076-C623-01

3.5.2 Bus Connectors 6ES7 972-0B.10-0XA0

Table 3-6 shows the bus connectors 6ES7 972-0B.10-0XA0.

Table 3-6 Description and Function of the Bus Connectors 6ES7 972-0B.10-0XA0

Appearance of the Bus Connectors No. Function

with heavy-gauge threaded joint

➀

➃

➄

without heavy-gauge threaded joint

➀

➄

➀

Connection tothe MPI, PROFIBUS-DPinterface (9-pinconnector)

➄

➄

➁

Connection forthe PROFIBUSbus cable

➂ ➂

➂Terminating re-sistance

➁

➂

➁

➂

➃Interface forPG/OP

➁ ➁

➄Screws for fixingto the node

Proceed as follows to connect the PROFIBUS bus cable to the bus connector6ES7 972-0B.10-0XA0:

1. Cut the bus cable to the desired length.

2. Insulate the bus cable in accordance with Figure 3-11.

ÇÇÇÇ

7.5 9

6

ÇÇÇÇ

7.5 9

6

6XV1 830–0AH10/-3BH10 6XV1 830–3AH10

16

Figure 3-11 Length of Bared Wire for Connecting to the Bus Connector

3. Open the housing of the bus connector by loosening the housing screws

4. Remove the cover.

Appearance

Installing thePROFIBUS BusCable for BusConnectors


3


5. Insert the green core and the red core in the screw terminal block in ac-cordance with Figure 3-12.

Please ensure that the same cores are always wired to the same connec-tion A or B (for example, always wire the green core to connection A andthe red core to connection B).

6. Press the cable sheath between the two clamping grips. This will hold itin place.

7. Screw the green and red core tightly in the screw terminal.

ÇÇ

A B A B

ÇÇ

A B A B

ÇÇ

Bus cable connection for first andlast nodes on an MPI network.

Bus cable for all further nodeson an MPI network.

The bus cable can beconnected on the rightor on the left!

Figure 3-12 Connecting Bus Cable to the Bus Connector

8. Screw the housing back on.

Please ensure that the cable shielding is bare under the shielding clip.


3


C79000-G7076-C623-01

3.5.3 Plugging the Bus Connector into the Module

Proceed as follows to connect the bus connector:

1. Plug the bus connector into the module.

2. Screw the bus connector to the module.

3. If the bus connector (Order No. 6ES7 ...) is at the start or end of a seg-ment, you must switch on the terminating resistance (switch position“ON”) (see Figure 3-13).

Please ensure that the stations with the terminating resistance are always sup-plied with power during power up and during operation.

Terminating resistanceswitched on

Terminating resistancenot switched on

on

off

on

off

Figure 3-13 Bus Connectors (6ES7 ...): Terminating Resistance Switched On and NotSwitched On

You can remove the bus connector with looped-through bus cable from thePROFIBUS-DP interface at any time without interrupting data traffic on thebus.

!Warning

Possibility of interrupting data traffic on the bus!

A bus segment must always be terminated at both ends by the terminatingresistance. This is not the case if the last slave with bus connector is not sup-plied with power. Since the bus connector draws its power from the node, theterminating resistance is ineffective.

Please ensure that the stations in which the terminating resistance isswitched in, are always supplied with power.

Connecting theBus Connector

Removing the BusConnector



Connecting a Programming Device /PC to a C7


4.1 Connecting a Programming Device/PC to a C7 4-2

4.2 Connecting a Programming Device/PC to Seve-ral Nodes

4-3

This Chapter

4

4


C79000-G7076-C623-01

4.1 Connecting a Programming Device/PC to a C7

This chapter covers the methods open to you for connecting a programmingdevice or PC via an MPI.

You will find information on cable lengths possible in each case in Section3.3.

You can connect a programming device or PC with the MPI of the C7 using aprefabricated programming device cable.

Alternatively, you can make up the connecting cable yourself using the PRO-FIBUS bus cable and bus connectors (see Section 3.5).

Figure 4-1 shows the components for connecting a programming device/PCto a C7.

Programmingdevice cable

Programming Device/PC

C7

Figure 4-1 Connecting a Programming Device/PC to a C7

Possibilities

Cable Lengths

Connecting aProgrammingDevice/PC to a C7

Connecting a Programming Device / PC to a C7

4


4.2 Connecting a Programming Device/PC to Several Nodes

This chapter shows you how to connect a programming device or PC to sev-eral networked nodes via the MPI:

When you connect a programming device/PC to several nodes, you must dif-ferentiate between two installation variants:

Fixed installation of the programming device/PC in the MPI network

Programming device/PC connected for startup and maintenance purposes.

Depending on this, you connect the programming device/PC with the othernodes as follows (see also Section 3.2).

Installation Variant Connection

Fixed installation of the program-ming device/PC in the MPI network

The programming device/PC islinked direct into the MPI network

Programming device/PC connectedfor startup and maintenance pur-poses

The programming device/PC is con-nected to one node via a spur line

Possibilities

Two InstallationVariants


4


C79000-G7076-C623-01

With fixed installation of a programming device/PC in the MPI network, youconnect the programming device/PC via a bus connector direct with the othernodes of the MPI network in accordance with the rules listed in Section 3.2.

Figure 4-2 shows a C7 network with two C7s. Both C7s are connected toeach other over the PROFIBUS bus cable.

PROFIBUS bus cable

C7

C7

Programmingdevice/PC

PROFIBUS bus cable

Figure 4-2 Connecting a Programming Device to Several C7s

If there is no stationary programming device/PC available, we recommendthe following:

In order to connect a programming device/PC for service purposes to an MPInetwork with “unknown” node addresses, we recommend that you set thefollowing address on the service programming device/PC:

MPI address: 0

Highest MPI address: 126.

Then find out the highest MPI address in the MPI network via S7 Configura-tion and adjust the highest MPI address on the programming device/PC tosuit that of the MPI network.

Fixed Installationof ProgrammingDevice/PC

Connecting theProgrammingDevice/PC forService Purposes


4


For startup or maintenance purposes, connect the programming device/PCvia a spur line to a node of the MPI network. The bus connector of this nodemust possess a heavy-gauge threaded joint for this purpose (see also Section3.5).

Figure 4-3 shows two networked C7s to which a programming device/PC isconnected.

PROFIBUS bus cable

Programming device/PCcable = spur line

C7

Programming Device/PC

C7

Figure 4-3 Connecting a Programming Device/PC to an MPI Network

ProgrammingDevice/PC forStartup orMaintenance


4


C79000-G7076-C623-01



C7 Digital Input/Output


5.1 Digital Input Function 5-2

5.2 Digital Output Function 5-5

5.3 Status and Fault Displays of the DI/DO 5-8

This Chapter

5

5


C79000-G7076-C623-01

5.1 Digital Input Function

The C7 has different digital inputs for connecting sensors.

This chapter presents the technical specifications of the C7’s digital inputs.

In addition to the technical specifications of the digital inputs, this chapteralso describes

The characteristics

The special features

The terminal connection and block diagrams of the digital inputs

The digital input function has the following characteristics:

16 inputs, isolated as a group

Nominal input voltage: 24 VDC

Suitable for switches and 2-wire proximity switches (BEROs), for example.

Introduction

Digital Input Function

Characteristics


5


Figure 5-1 shows the terminal connection and the block diagram of the digi-tal input function.

The pages following contain detailed technical specifications of the digitalinputs.

Channel number

Pin No.

0.00.10.20.30.4

0.50.60.7

Parts with this shadingare not relevant to thisexample.

01234

5670

1234567

Digital inputs

1L+1M

24 V for DIGround for DI

1.01.11.21.31.4

1.51.61.7

Block diagram

24 V1L+

Minternal

Bottom view of C7

1M

Figure 5-1 Terminal Connection and Block Diagram of the Digital Input Function

TerminalConnection andBlock Diagram


5


C79000-G7076-C623-01

Specific Data of the Digital Input Function

Number of inputs 16

Cable length

Unshielded

Shielded

600 m

1000 m

Voltages, Currents, Potentials

Nominal load voltage L + 24 VDC

Number of simultaneously en-ergizable inputs

16

Galvanic isolation

In groups of

Yes (optocoupler)

16

Permissible potential differ-ence

Between the M terminalsof the groups

Insulation resistance

–

500 VDC

Status, Interrupts, Diagnostics

Interrupts No

Diagnostics functions No

Data for Selecting a Sensor

Input voltage

Nominal voltage

For “1” signal

For “0” signal

24 VDC

from 11 to 30 V

from -3 to 5 V

Input current

For “1” signal from 6 to 11.5 mA

Input delay time

Programmable

At “0” to “1”

At “1” to “0”

No

from 1.2 to 4.8 ms

from 1.2 to 4.8 ms

Input characteristic In accordance withDIN EN 61131–2(IEC 1131, Part 2)

Type of input in accordancewith IEC 1131

Type 2

Connection of 2-wire BEROs

Permissible quiescent cur-rent

Possible

2 mA


5


5.2 Digital Output Function

The digital output function has the following characteristics:

16 outputs, isolated.

Output current: 0.5 A

Nominal load voltage: 24 VDC

Suitable for solenoid valves and d.c. contactors.

When the supply voltage is switched on, the digital output function sends apulse to the outputs. A pulse can be approximately 50 s within the permissi-ble output current range.

Characteristics

Special Feature


5


C79000-G7076-C623-01

Figure 5-2 shows the terminal connection and the block diagram of the digi-tal outputs.

The pages following contain detailed technical specifications of the digitaloutputs.

Channel number

Pin No.

Parts with this shadingare not relevant to thisexample.

01234

5670

1234567

Digital outputs

2L+2L+2M3L+3L+3M

Load power supply

Pin No.

0.00.10.20.30.4

0.50.60.71.01.11.21.31.4

1.51.61.7

Block diagram

2L+

2M

+24V

Ground

+24V

Ground

DO 0.0...0.7

DO 1.0...1.7

Bottom view of C7

Figure 5-2 Terminal Connection and Block Diagram of the Digital Outputs

If the maximum permissible current is utilized for the load power supply,both pins should be wired to avoid overloading of the contacts. For relativelylow currents, wiring of only one +24V pin is sufficient.

TerminalConnection andBlock Diagram

Connection ofLoad PowerSupply


5


Specific Data of the Digital Output Function

Number of outputs 16

Cable length

Unshielded

Shielded

600 m

1000 m


Nominal load voltage L + 24 VDC/0.5A

Total current of the outputs(per group)

Up to 20 C

Up to 45 C

4 A

2 A

Galvanic isolation

In groups of

Yes (optocoupler)

8

Insulation resistance 500 VDC


Interrupts No

Diagnostics functions No

Data for Selecting an Actuator

Output voltage

At “1” signal L + (– 0.8 V)

Output current

At “1” signalnominal valuePermissible range

At “0” signal (quiescentcurrent)

0.5 A5 mA..0.5 mA

max. 0.5 mA

Lamp load max. 5 W

Parallel switching of 2 outputs

For logic operations

For enhancing perfor-mance

Possible (outputs ofthe same group only)

Not possible

Activating a digital input Yes

Max. switching frequency

With resistive load/lampload

With inductive load

100 Hz

0.5 Hz

Inductive cutoff voltage lim-ited (internally) to

L + (– 48 V)

Short-circuit protection of theoutputs

Operating point

Yes, electronicallytimed

1 A


5


C79000-G7076-C623-01

5.3 Status Displays of DI/DO

The process image of the digital I/O can be displayed using a C7 systemfunction. The values represented are read as direct process image of the DIand internal process image of the DO of the C7 and displayed in BIN format.It is not possible to change the display.

In the STOP state, the actual process status for DO is 0. The process imagedisplayed may deviate from this; it is the last status set by the control pro-gram.

Selection of the DI/DO status display does not require an operator password.You select the function as follows:

Select the System Function Menu by pressing


C7-624: By pressing

....

The following data are supplied:

= Anwahl der

10101010 1.7–1.0

DI:11101110 0.7–0.0

DO:11101110 0.7–0.010101010 1.7–1.0

➀ ➁

Figure 5-3 DI/DO Status Display on a C7-623

Table 5-1 Explanation of the DI/DO Display in Figure 5-3

Position Explanation

➀ Signal status of the DI/DO

1 DI/DO set

0 DI/DO reset

➁ Pin no. from – to

Overview

Selecting theDI/DO StatusDisplay


5


Note

Since the display is based on a polling read access, status changes within aninterval < 400 ms cannot be detected. However, modifications of the cyclic400 ms grid may result in an unstable display.

Exit the DI/DO display by pressing

and then press

again to exit

the System Function Menu.

Exiting the DI/DODisplay


5


C79000-G7076-C623-01



C7 Analog Input/Output


6.1 Analog Technology 6-2

6.2 Connecting Transducers to Analog Inputs 6-3

6.2.1 Connecting Voltage and Current Sensors 6-6

6.3 Connecting Loads/Actuators to the Analog Output 6-7

6.4 Analog Input Function 6-10

6.4.1 Characteristics and Technical Specifications of theAnalog Input Module

6-11

6.5 Analog Output Function 6-16

This Chapter

6

6


C79000-G7076-C623-01

6.1 Analog Technology

There are different analog inputs and one analog output available to you inthe C7 for connecting sensors and/or loads/actuators.

This section covers the following:

A description of analog value representation, the measuring types, mea-suring ranges and output ranges in the C7

A description of how to connect the sensors or loads/actuators to the ana-log I/O

The principles of using analog I/O

Behavior of analog I/O

The C7 cannot be installed in an ungrounded configuration.

Introduction

Analog I/O

Ungrounded Configuration


6


6.2 Connecting Transducers to Analog Inputs

You can connect various types of transducers to the analog inputs:

Voltage transducers

Current transducers as 4-wire transducers

This section tells you how to connect up your transducers and what precau-tions you have to take when doing so.

To reduce electrical interference, you should use twisted-pair shielded cablesfor the analog signals. The shield of the analog signal cables should begrounded at both cable ends. If there are potential differences between thecable ends, an equipotential bonding current can flow over the shield. Thiscan interfere with the analog signals. In such a case, you should ground theshield at one end of the cable only.

The analog input is isolated and so there is no electrical connection betweenthe reference point of the measuring circuit MANA and the M terminal of theC7 power supply (see Figure 6-1).

A potential difference UISO can occur between the reference point of themeasuring circuit MANA and the M terminal of the C7. Make sure that UISOdoes not exceed the permissible value. Where it is possible that the permissi-ble value might be exceeded (see technical specifications), establish a con-nection between the MANA terminal and the M terminal of the C7.

A potential difference UCM (common mode voltage) may occur between themeasuring line AIx-M of the input channels and the reference point of themeasuring circuit MANA. However, this potential difference must not exceedthe permissible value. Where it is possible that the permissible value for UCMmight be exceeded, or where you cannot determine the difference in potentialaccurately, you must connect AIx-M to MANA. Please observe this also forthe unused inputs.

Overview

Cables for AnalogSignals

Isolated AnalogInput

ConnectingTransducers toAnalog Inputs


6


C79000-G7076-C623-01

The abbreviations used in Figures 6-1 to 6-3 have the following meanings:

AIx-X: Measuring line AIx-U or AIx-I

AIx-M: Reference potential of the measuring line

MANA: Reference potential of the analog measuring circuit

M: Ground terminal of the C7

UCM: Potential difference between inputs and MANA

UISO: Potential difference between MANA and the M terminal of the C7

The isolated transducers are not connected with the local ground potential.They can be operated free of potential. Local conditions or interference cancause potential differences UCM (static or dynamic) to occur between themeasuring lines M of the input channels and the reference point of the mea-suring circuit MANA. However, this potential difference must not exceed thepermissible value. Where it is possible that the permissible value for UCMmight be exceeded, or where you cannot determine the difference in potentialaccurately, you must connect AIx-M to MANA.

Figure 6-1 shows the principle of connecting isolated transducers to an iso-lated analog input module.

Isolated transducers

AIx-X

MANA

C7 CPU

UCM

ADU

MUISO

Logic

AIx-M

AIx-XAIx-M

L+

C7

Ground bus

Figure 6-1 Connecting Isolated Transducers to an Isolated Analog Input Module

Abbreviations

IsolatedTransducers


6


The non-isolated transducers are connected on-site with the ground potential.Depending on local conditions or interference, potential differences (static ordynamic) can occur between the locally distributed measuring points. To pre-vent these potential differences, you must provide equipotential bonding con-ductors between the measured value points.

In addition, potential differences UCM (static or dynamic) can arise betweenthe measuring lines AIx-M of the input channels and the reference point ofthe measuring circuit MANA. However, these potential differences must notexceed the permitted value. Where it is possible that the permissible valuefor UCM might be exceeded, or where you cannot determine the difference inpotential accurately, you must connect AIx-M to MANA.

Figure 6-2 shows the principle of connecting non-isolated transducers to anisolated analog input module.

Non-isolatedtransducers

MANA

C7 CPU

UCM

ADU

Ground bus

UISO

Logic

AIx-XAIx-M

AIx-XAIx-M

C7

ML+

Figure 6-2 Connection of Non-Isolated Transducers to an Analog Input Module

Non-IsolatedTransducers


6


C79000-G7076-C623-01

6.2.1 Connecting Voltage and Current Transducers

The abbreviations and mnemonics used in Figures 6-3 to 6-4 have the follow-ing meanings:

AIx-X: Measuring line AIx-I or AIx-U

AIx-M: Reference potential of the measuring line

MANA: Reference potential of the analog measuring circuit

Figure 6-3 shows the connection of voltage transducers to an isolated analoginput.

MANA

ADU

+

–U

+

–U C7 CPU

Logic

AIx-U

AIx-MAIx-U

AIx-M

Figure 6-3 Connecting Voltage Transducers to an Isolated Analog Input

4-wire transducers possess a separate voltage supply. Figure 6-4 shows theconnection of current transducers as 4-wire transducers to a non-isolated ana-log input module.

MANA

ADUP

P

Transducers, e.g.pressure gauges

tran

sduc

ers

4-w

ire

+–

+–

L+ M

C7 CPULogic

AIx-U

AIx-MAIx-U

AIx-M

Figure 6-4 Connecting 4-Wire Transducers to a Non-Isolated Analog Input Module

Abbreviations andMnemonics

ConnectingVoltageTransducers

ConnectingCurrentTransducers as4-WireTransducers


6


6.3 Connecting Loads/Actuators to the Analog Output

You can provide loads/actuators with current or voltage using the analog out-put.

To reduce electrical interference, you should use twisted-pair shielded cablesfor the analog signals. The shield of the analog signal cables should begrounded at both cable ends. If there are potential differences between thecable ends, an equipotential bonding current can flow over the shield. Thiscan interfere with the analog signals. In such a case, you should ground theshield at one end of the cable only.

The analog output is isolated and so there is no electrical connection betweenthe reference point of the AO-M analog circuit and the M terminal of the C7.

A potential difference UISO can occur between the reference point of the ana-log circuit MANA and the M terminal of the C7. Make sure that UISO does notexceed the permissible value. Where it is possible that the permissible valuemight be exceeded (see technical specifications, establish a connection be-tween the AO-M terminal and the M terminal of the C7.

The abbreviations and mnemonics in the Figures 6-5 to 6-6 have the follow-ing meanings:

AO-I: Analog output: current

AO-U: Analog output: voltage

RL: Load/actuator

AO-M : Ground terminal (reference potential of the analog output)

L+: Terminal for 24 VDC supply voltage

MISO: Potential difference between MANA and the M terminal of the C7.

Figures 6-5 to 6-6 show you how to connect loads/actuators to the currentand/or voltage outputs of the analog output module.

Overview

Cables for AnalogSignals

Isolated AnalogOutput

Abbreviations andMnemonics


6


C79000-G7076-C623-01

You must connect loads to a current output at QI and the reference point ofthe analog circuit MANA

Figure 6-5 shows the principle of connecting loads to a current output of anisolated analog output module.

C7 CPUDAU

RL

AO-I

Ground bus

UISO

Log-ic

C7

ML+

AO-M

Figure 6-5 Connecting Loads to a Current Output of an Isolated Analog OutputModule

Connection of loads to a voltage output is only possible in 2-wire circuits asthere is only one output.

Connecting Loadsto a current Output

Connecting Loadsto a VoltageOutput


6


2-wire connection of loads to a voltage output is carried out at terminal QVand the reference point of the measuring circuit MANA.

Figure 6-6 shows the principle of connecting loads to a voltage output of anon-isolated analog output module with 2-wire connection.

C7 CPUDAU

Ground bus

Log-ic

RL

AO-U

C7

ML+ UISO

AO-M

Figure 6-6 2-Wire Connection of Loads to a Voltage Output of an Analog OutputModule

2-Wire Connection


6


C79000-G7076-C623-01

6.4 Analog Input Function

This section contains

The characteristics of the analog input module

The technical specifications of the analog input module

You will learn

How to start up the analog input module

The measuring ranges provided by the analog input module

The parameters you can use to influence the characteristics of the analoginput module.

The following measurement types are available on the analog input module:

Voltage measurement

Current measurement

The measuring ranges are:

Voltage: 10V

Current: 20mA, 4 to 20mA

For the current range 4 to 20 mA, a current of < 1.6 mA is interpreted persoftware as a wirebreak (see Volume 2, Section 5.2).

Measuring ranges for current measurement with 4-wire transducers:

20mA

4 to 20mA

This Section

AvailableMeasurementTypes

Measuring Ranges

Wire Break Check

Measuring Rangesfor 4-WireTransducers


6


6.4.1 Characteristics and Technical Specifications of the Analog InputModule

The analog input module has the following characteristics:

4 inputs

Measured value resolution

– 12 bits incl. sign

Measurement type selectable:

– Voltage

– Current

Choice of measuring range per input

Parameterizable diagnostics

Parameterizable diagnostics interrupt

Parameterizable interrupt cycle

Isolated

Characteristics


6


C79000-G7076-C623-01

Figure 6-7 shows the terminal connection diagram of the analog inputs.

Pinout diagram

Voltage measurementAnalog inputs

Pin desig.

AI1-UAI1-IAI1-MAI2-UAI2-I

AI2-MAI3-UAI3-IAI3-M

AI4-UAI4-I

21

3V

54

6V

87

9V

1110

12V

Current measuremt.

21

3

54

6

87

9

1110

12AI4-MMANA

Parts shaded in this way are not relevant for the explanation.

View of right-hand side of C7

Figure 6-7 Terminal Connection Diagram of the Analog Inputs

!Caution

The jumper between pins 1 + 2, 4 + 5, 7 + 8, 10 +11 must also be wired inthe case of current measurement.

TerminalConnectionDiagram


6


Three pins are combined to form a channel.

Table 6-1 Channels of the Analog Input Module

Pin-No. Value Channel

AI1–U Voltage input Channel 1

AI1–I Current input (AI1)

AI1–M Reference potential










Only one analog sensor can be connected to an analog input channel.

Voltage Measurement

CurrentVoltage

Reference potential

One channel voltage measurement

Figure 6-8 Connection of a Channel for Voltage Measurement

Current Measurement

When connecting a current measurement channel, the voltage pin and thecurrent pin are to be jumpered.

CurrentVoltage

Reference potentialOne channel current measurement

Figure 6-9 Connection of a Channel for Current Measurement

Channels

Connection of anAnalog Input


6


C79000-G7076-C623-01

Figure 6-10 shows the block diagram of the analog input module. The inputresistances are 140 Ω / 125 mW. The next page contains detailed technicalspecifications of the analog input module.

Internal sup-ply

Logic

AE1

AE4

••••••

Galvanicisolation

ADU

Figure 6-10 Block Diagram of the Analog Input Module

Specific Data of the Analog Input Function

Number of inputs 4

Cable length, shielded 200 m


Nominal load voltage L +

Polarity reversal protection

24 VDC

Yes

Voltage supply to the transduc-ers

Short circuit protection Yes

Galvanic isolation(analog I/O to electronics)

Yes

Permissible potential differ-ence

Between reference poten-tial of inputs and MANA

(UCM) if signal = 0V

Insulation resistance

2.5 VDC

500 VDC

Analog Value Generation

Measurement principle Momentary value

Basic conversion time 2.5 ms

Resolution in bit incl.sign (incl. overrange)

12

Transition frequency in-put filter

132 kHz

Measurement ranges:

VoltageCurrent

V/A at different pins–> no coding pin–10...10V–20...20mA, 4...20mA

Measurement tolerance 1% of the end value

Block Diagram

TechnicalSpecifications


6


Interference Suppression, Error Limits

Interference voltage suppres-sion for f = n (f1 1 %),(f1 = interference frequencies) Common mode interfer-

ence (UPP < 2.5 V)

Series-mode interference(peak value of interfer-ence < nominal value ofinput range)

> 70 dB

> 40 dB

Cross-talk between the inputs

At 50 Hz

At 60 Hz

50 dB

50 dB

Basic error limit (operationallimit at 25 C) 1%


Input ranges (nominal val-ues)/input resistance

Voltage 10 V; /100kΩ

Current 20 mA;4 to 20 mA;

<250 Ω<250 Ω

Permissible input voltage forvoltage input (destructionlimit)

18 V

Permissible input current forcurrent input (destructionlimit)

30 mA

Connection of signal sensors

for voltage measurement

for current measurementas 4-wire transducer

Possible

Possible

Temperature compensation Balanced by continu-ous on-line calibration


Interrupts

Interrupt cycle

Diagnostic interrupt

Yes, parameterizable


Diagnostic functions

Diagnostic informationreadable


Yes

Time intervals Yes, parameterizable

Wirebreak detection Parameterizable (persoftware) at measuringrange 4 to 20mA


6


C79000-G7076-C623-01

6.5 Analog Output Function

This section contains

The characteristics of the analog output function

The technical specifications of the analog output function

You will learn

How to start up the analog output function

The various ranges of the analog output function

The parameters you can use to influence the characteristics of the analogoutput function

The technical specifications of the analog output function.

The output function has the following characteristics:

1 output

The output can be selected either as

– Voltage output or

– Current output

Resolution 12 bits incl. sign

Parameterizable diagnostics

Isolated

Note

If you modify the output ranges during operation of the analog output func-tion, intermediate values can arise at the output!

This Section

Characteristics


6


Figure 6-11 shows the terminal connection diagram of the analog outputfunction.

Terminal con-nection diagram

Current outputVoltage output

Analog output

Pin desig.

12345

6789

1011

AO-UAO-IAO-M

1514

16V

A

Parts shaded in this way are not relevant forthe explanation.


Figure 6-11 Pinout Diagram of the Analog Output Function

Figure 6-12 shows the block diagram of the analog output module. You willfind detailed technical specifications of the analog output module on the fol-lowing pages.


Block Diagram


6


C79000-G7076-C623-01

Block diagram

DAU

AA1

Galvanicisolation

Figure 6-12 Block Diagram of the Analog Output Function

Specific Data of the Analog Output

Number of outputs 1



Galvanic isolation Yes

Insulation resistance 500 VDC

Measurement ranges:

VoltageCurrent

V/A at different pins –>no coding pin10V20mA, 4...20mA

Analog Value Generation

Resolution (including over-range)

10 V; 20 mA; 4 to 20 mA

12 bits incl. sign

Conversion time max. 0.8 ms

Settling time

For resistive load

For capacitive load

For inductive load

0.1 ms

3.3 ms

0.5 ms

Substitute value injectable Yes, parameterizable

Interference Suppression, Error Limits

Measuring tolerance 1% of end value

Basic error limit (operationallimit at 25 C, referred to out-put range)

Voltage

Current

1%

1%

Output ripple (referred to out-put range)

0.05 %


Interrupts

Diagnostics interrupt Yes, parameterizable

Diagnostics functions

Diagnostics informationreadable


Yes, group error/fault

TechnicalSpecifications


6


Data for Selecting an Actuator

Output ranges (nominal values)

10 V 20 mAfrom 4 to 20 mA

Load resistance

At voltage outputs

At current outputs

Capacitive Load

Inductive Load

min. 2 k

max. 500

max. 1 F

max. 1 mH

Voltage output

Short-circuit protection

Short-circuit current

Yes (countervoltage–proof)

max. 25 mA

Current output

Idle voltage min.15V

Connection of actuators

For voltage output2-wire connection

For current output2-wire connection

Possible

Possible

Supply of sensors External (not via C7)


6


C79000-G7076-C623-01



Universal Inputs

This chapter describes the technical specifications and characteristics of theuniversal inputs for the C7.

Universal Inputs

7

7


C79000-G7076-C623-01

The C7 has 4 digital universal inputs that provide the following functionality:

Interrupt input

Counter input

Frequency/period duration counter input

Digital input

These input functions can be set by parameterization.

Figure 7-1 shows the pin assignments of the universal inputs

1

2

3

4

5

6

7

8

9

10

11

12

Universal inputs

Not assigned

DI–X1Ground

DI–X2DI–X3DI–X4

Parts shaded in this wayare not relevant for theexplanation.


Figure 7-1 Pin Assignments of the Universal Inputs

Overview


Universal Inputs

7


The pin assignments of the universal inputs are as follows:

Table 7-1 Assignments of the Universal Inputs

Pin No. Function

M Relevant ground

DI–X1 Universal input 1 ( interrupt input, digital input, or counter input)

DI–X2 Universal input 2 ( interrupt input, digital input, or counter input)

DI–X3 Universal input 3 (interrupt input, digital input, counter input, frequencycounter input or period duration counter input)

DI–X4 Universal input 4 ( interrupt or digital input)

Not connected

Not connected

Not connected

The universal inputs are set per software. This is done using the “S7 Configu-ration” tool. You use this tool to determine which function the individual in-put is to execute (see Table 7-1).

If this function is set, the input responds like a normal interrupt input, that is,a process interrupt is triggered in the C7 CPU as a response to the parameter-ized edge.

If this function is set, the input responds like a normal digital input (see Sec-tion 5.2). The only difference here is that the current process signal is notautomatically fed to the control program but must first be read in from theI/O.

These universal inputs enable you to capture counter pulses up to a frequencyof 10 kHz. The counter can count either up or down.

This enables you to count pulses within a programmed length of time. Fromthis you can calculate a frequency 10 kHz.

This function enables you to count fixed timer ticks between two equaledges. From this you can calculate the duration of an interval period.

Pin Assignmentsof the UniversalInputs

Parameterizing theInputs

Interrupt Input

Digital Input

Counter Input

FrequencyCounter

Period DurationCounter

Universal Inputs

7


C79000-G7076-C623-01

Specific Data of the Universal Inputs

Number of inputs 4


unshielded 600 m


Nominal load voltage L + 24 VDC

Number of simultaneously en-ergizable inputs

4

Galvanic isolation No

Function, Interrupts, Diagnostics

InterruptsCounter functionsMax. counter frequency

Counters Principle Counter range

Limit value (setpoint)specification

Counter interrupt of upcounter

Counter interrupt of downcounter

Enable

Period Duration Counter Principle

Counter range Max. period duration

Frequency Counter Principle

Counter range Gate width Max. frequency

ParameterizableParameterizable10 kHzModule standard dia-gnostics in conjunctionwith analog I/O. Nochannel-specific dia-gnosticsMax. 3Edge countingup 0 to 65535down 65535 to 01 value per counter

When limit value isreached

When “0” is reached

In the program

Max. 1Counting betweenfixed time units fromtwo positive edges0 to 167772158.395 s or 0.119 Hz

Max. 1Counting of pulseswithin a time period0 to 167772150, 1s, 10s (settable)10 kHz; limited by in-put filter


Input voltage

Nominal voltage

For “1” signal

For “0” signal

24 VDC

from 11 to 30 V

from –3 to 5 V

Input current

At “1” signal from 2 to 8 mA

Input delay time

Programmable

At “0” to “1”

At “1” to “0”

No

approx. 0.01 ms

approx. 0.01 ms

Input characteristic In accordance withIEC 1131, Part 2

Type of input in accordancewith IEC 1131

Type 2

Input current

At “1” signal From 6 to 11.5 mA

TechnicalSpecifications ofthe UniversalInputs

Universal Inputs


Maintenance


8.1 Changing and Disposing of the Backup Battery 8-2

8.2 Replacing the C7 8-6

This Chapter

8

8


C79000-G7076-C623-01

8.1 Changing and Disposing of the Backup Battery

You must always change the backup battery during POWER ON. This pre-vents any data loss in the internal user memory during battery change.

Note

The data in the internal user memory will be lost if you change the batteryduring POWER OFF!

Change the battery during POWER ON only!

Proceed as follows to change the backup battery:

Step Action

1. Unscrew the cover of the C7 battery compartment (see Figure 8-1).

2. Lift the cover up and to the right (see Figure 8-2). Make sure you raise thecover only as far as the battery connections allow.

3. Remove the battery connector of the old backup battery.

4. Loosen the cable binders with which the backup battery is attached to thecover (see Figure 8-3).

5. Attach the new backup battery with the cable binders to the cover.

6. Plug the battery connector of the new backup battery into the relevant socketin the battery compartment of the C7. The notch on the battery connectormust point to the left (see Figure 8-3).

7. Close the battery cover with the springs to the left onto the C7 and screw thecover tight again.

Note

Do not touch any interior components of the C7 with your hands or a metalpart (screwdriver). Electrical components and PCB are not sufficiently pro-tected for this purpose. Please observe ESD guidelines.

Change DuringPOWER ON Only

Changing theBackup Battery ofthe C7

Maintenance

8


Battery cover

Cable binder

Figure 8-1 Battery Cover Before Opening

Figure 8-2 Battery Cover

Maintenance

8


C79000-G7076-C623-01

Figure 8-3 Inserting the Backup Battery

We recommend that you change the battery every year.

Please observe national regulations/guidelines concerning the disposal ofbackup batteries.

Store backup batteries in a cool, dry place.

Backup batteries can be stored for up to 5 years.

!Warning

Backup batteries can ignite or explode and constitute a serious fire hazard ifthey are heated or damaged!

Store backup batteries in a cool and dry place.

How Often ShouldYou Change theBattery

Disposal

Storage of BackupBatteries

Maintenance

8


To prevent hazard in the use of backup batteries, you must observe the fol-lowing rules:

!Warning

The use of backup batteries can result in injury and damage.

Wrongly handled backup batteries can explode or cause serious burns.

Do not

recharge

heat

burn

drill

crush

short-circuit

backup batteries.

Rules for theHandling and Useof BackupBatteries

Maintenance

8


C79000-G7076-C623-01

8.2 Replacing the C7

On-site repair of the C7 has not been provided for. For this reason, a defec-tive C7 must be replaced.

The following prerequisites must be met for replacing a C7:

Hardware

Programming device/PC with MPI interface module

Relevant connecting cable

Development tools

STEP 7

ProTool or ProTool/ Lite

User software (stored outside the C7)

User configuration

User control software (if data from the C7 CPU no longer readable).

Proceed as follows:

Mechanical removal takes place in the opposite order to the installation.

Connect a PG/PC to the MPI.

Use STEP 7 to transfer the user program stored in the C7 CPU to aPG/PC.If the C7 CPU is defective and the user program can no longer be readout, remove the C7 without any further safety measures.

The configuration loaded onto the C7 cannot be read out. It must be avail-able on a PG/PC.

As soon as you have a new C7, install it as follows:

1. The mechanical and electrical installation is as described in the manual.

2. Connect a PG/PC to the MPI.

3. Perform a memory reset of the C7 as described.

4. Transfer the previously saved user program from the PG/PC with the rele-vant data to the C7 CPU (using STEP 7).

5. Load your configuration with ProTool or ProTool/Lite into the C7.

6. Start the user program.

Introduction

Prerequisite

Removal

Installation

Maintenance

A-1C7–623, C7–624 Control SystemsC79000-G7076-C623-01

General Technical Specifications

This chapter lists the general technical specifications of the C7:

These general technical specifications contain the standards and test valuesthat the C7 conforms to, or the criteria against which the C7 has been tested.


A.1 Technical Specifications A-2

A.2 Notes on the CE Marking A-5

A.3 Notes for the Machine Manufacturer A-6

A.4 Transport and Storage Conditions for Backup Bat-teries

A-7

What Are GeneralTechnicalSpecifications?

This Chapter

A

A

A-2C7–623, C7–624 Control Systems

C79000-G7076-C623-01

A.1 Technical Specifications

The table contains the technical specifications of the overall unit. The datafor the I/O can be found in the relevant chapters.

Table A-1 Technical Specifications of the C7

Criterion Technical Specifications

C7-623 C7-624

Order number C7-623 : 6ES7623-1AE00-0AE3

C7-624 : 6ES7624-1AE00-0AE3

Dimensions 240 x 168 x 60 mm (H x W x D)

Weight C7-623: 1350gC7-624: 1390g

C7-623 display STN-LC display/ 4 lines of 20 characters each, 5mm character heght/ LEDbacklit

C7-624 display STN-LC display / 4 x 20 characters, 8 mm character height or 8 x 40 charac-ters;4.5 mm character height / LED backlit

Keypad Membrane keypad with metal domes

C7-623: 44 keys

C7-624: 48 keys

26 integral LEDs

Serial interface V.24 (printer)

MPI Standard MPI

Backup battery Backup time approx. 1 year

C7-OP

Flash memory(configuring memory)

C7-623: 128 KbytesC7-624: 256 Kbytes

Work memory 128 Kbytes

Power supply

Supply voltage (UN)

Polarized input voltage connection

Voltage interruption(can be jumpered)

24V DC; (20.4 to 30.2V DC; safety low voltage)The,C7–623 and C7–624 has no internal protection against high–energysurge pulses in the µs range.

Yes

20ms

Current consumption (IN) 2400 mA max.

Safety

Standardization DIN EN 61131–2 IEC 1131–2

Electromagnetic compatibility (EMC)

Emitted interference

Limit value class B in accordance with EN 55022 CISPR 22


A


Table A-1 Technical Specifications of the C7

Criterion Technical Specifications

Conducted interference on AC voltage supply lines

±2kV (in accordance with IEC 801-4/IEC 1000–4–4; burst)±1kV (in accordance with IEC 801-5/IEC 1000–4–5; µs pulse / line to line)±2kV (in accordance with IEC 801-5/IEC 1000–4–5; µs pulse / line to

ground)

Noise immunity on signal lines ±2kV (in accordance with IEC 801-4/IEC 1000–4–4; burst)

Noise immunity against discharge ±6kV, discharge on contact (in accordance with IEC 801-2/IEC 1000–4–2; ESD)

±8kV, atmospheric discharge (in accordance with IEC 801-2/IEC 1000–4–2; ESD)

Immunity to high-frequency radiation

10V/m with 80% amplitude modulation with 1kHz,10kHz-80MHz (in accordance with EN 50 141)10V/m with 80% amplitude modulation with 1kHz,80kHz-1GHz (in accordance with EN 50 140)10V/m, pulse–modulated, 50 % c.d.f. with 900 MHz (to EN 50 140)

Climatic conditions

Temperature

Operating

Non-operating

Tested in accordance with DIN IEC 68-2-1, DIN IEC 68-2-2

± 0°C to +45°C if installed at an angle of 45°± 0°C to +50°C for vertical installation

Note:. C7–624: At 45°C and with horizontal installation, legibility of the

display is restricted..

C7–623: At temperatures < 10°C, fast changing values are no longer shown correctly.

–20°C to +70°C

Relative humidity

Operating

Non-operating

Tested in accordance with DIN IEC 68-2-3

5% to 95% at 25°C (no condensation)

5% to 95% at 25°C (no condensation)

Atmospheric pressure

Operating

Non-operating1080–795 hPa ( –1000m bis +2000m)

1080–660 hPa ( –1000m bis +3500m)

Mechanical environmental conditions

Vibration

Operating

Non-operating


10 to 58Hz, amplitude 0.075mm

58 to 500Hz, acceleration 9.8m/s2

5 to 9Hz, amplitude 3,5mm9 to 500Hz, acceleration 9.8m/s2

Shock

Operating

Non-operating


Semi-sinusoidal: 100m/s2 (10g), 16ms, 100 shocks

250m/s2 (25g), 6ms, 1000 shocks

Resistance to fire hazards:

Connector strips

Connector strips in housings

V2

V0


A


C79000-G7076-C623-01

The entire 24 V DC power supply for the C7–623 and C7–624 (operatingvoltage, load voltage, relay power supply, etc.) must be provided in the form ofsafety extra-low voltage (SELV).

!Warning

Personal injury and damage to property can occur.

If you do not provide the correct 24 V DC power supply for your C7–623 andC7–624, this may result in damage to components of your programmable con-troller and personal injury.

Use only safety extra-low voltage (SELV) for the 24 V DC power supply to yourC7–623 and C7–624.

The following markings are used to show the relevant approval:

Underwriters Laboratories (UL) to UL 508 standard

UL-Recognition-Mark

Canadian Standard Association (CSA) to standard C 22.2. No 142

FM

APPROVED

FM-Standards No. 3611, 3600, 3810 APPROVED for use in Class I, Division 2, Group A, B, C, D indoor hazardous locations.

24 V DC PowerSupply

Relevant for theU.S.A. and Canada

FM Approval


A


A.2 Notes on the CE Marking

Products bearing the CE marking meet the requirements of the EU directive89/336/EEC “Electromagnetic Compatibility”.

In accordance with the above-mentioned EU directive, Article 10 (1), the EUdeclarations of conformity and the relevant documentation are held at the dis-posal of the competent authorities at the address below:

Siemens AktiengesellschaftBereich AutomatisierungstechnikAUT E 14Postfach 1963D-92209 AmbergFederal Republic of Germany

The product has been designed for use in the following areas in accordancewith its CE marking:

Area of Application Requirements:Emitted Interference Immunity

Industrial– and Office areaEN 50081-2: 1993 EN 50082-2: 1995

Household, business and tradearea, small plants EN 50081-1: 1992 EN 50082-1: 1992

The installation guidelines and safety instructions described in the manual mustbe observed when installing and operating the device.

EC EMV Directive89/336/EEC

Area ofApplication

Observing theInstallationGuidelines


A


C79000-G7076-C623-01

A.3 Notes for the Machine Manufacturer

The SIMATIC programmable controller system is not a machine as defined inthe EU Machinery Directive. There is therefore no declaration of conformityfor SIMATIC with regard to the EU Machinery Directive 89/392/EEC.

The EU Machinery Directive 89/392/EEC regulates requirements relating tomachinery. A machine is defined here as an assembly of linked parts or compo-nents (see also EN 292-1, Paragraph 3.1).

SIMATIC is part of the electrical equipment of a machine and must therefore beincluded by the machine manufacturer in the declaration of conformity proce-dure.

The EN 60204-1 standard (Safety of Machinery, Electrical Equipment of Ma-chines, Part 1, Specification for General Requirements) applies for electricalequipment of machinery.

The table below is designed to help you with the delcaration of coformity and toshow which criteria apply to SIMATIC according to EN 60204-1 (as at June1993).

EN 60204-1 Subject/Criterion Remarks

Paragraph 4 General requirements Requirements are met if the devices are mounted/installed in accor-dance with the installation guidelines.Please observe the explanations on the previous pages.

Paragraph 11.2Digital input/output interfa-ces

Requirements are met.

Paragraph 12.3Programmable equipment Requirements are met if the devices for protection of memory con-tents against change by unauthorized persons are installed in lockedcabinets.

Paragraph 20.4Voltage tests Requirements are met.

Introduction

EU MachineryDirective89/392/EEC

ElectricalEquipment ofMachinery inAccordance withEN 60204


A


A.4 Transport and Storage Conditions for Backup Batteries

Transport backup batteries where possible in their original packaging. Ob-serve the regulations for the transport of dangerous goods and substances.The backup battery contains approximately 0.25 g of lithium.

Note: According to air freight transport regulations, the backup battery is inHazardous Goods Class 9.

Store backup batteries in a cool, dry place.

Backup batteries can be stored for up to 5 years.

!Warning

Backup batteries can ignite or explode and constitute a serious fire hazard ifthey are heated or damaged!

Store backup batteries in a cool and dry place.

To prevent a hazard in the use backup batteries, you must observe the follow-ing rules:

Do not

recharge

heat

burn

drill

crush

short-circuit

backup batteries.

Transport ofBackup Batteries

Storage of BackupBatteries

Rules for theHandling and Useof BackupBatteries


A


C79000-G7076-C623-01


B-1C7–623, C7–624 Control SystemsC79000-G7076-C623-01

Guidelines for Handling ElectrostaticSensitive Devices (ESD)


B.1 What is ESD? B-2

B.2 Electrostatic Charging of Objects and Persons B-3

B.3 General Protective Measures Against ElectrostaticDischarge Damage

B-4

B.4 Taking Measurements and Working onESD Modules

B-6

B.5 Packing Electrostatic Sensitive Devices B-6

This Chapter

B

B

B-2C7–623, C7–624 Control Systems

C79000-G7076-C623-01

B.1 What is ESD?

All electronic modules are equipped with large-scale integrated ICs or com-ponents. Due to their design, these electronic elements are very sensitive toovervoltages and thus to any electrostatic discharge.

These Electrostatic Sensitive Devices are commonly referred to by the ab-breviation ESD.

Electrostatic sensitive devices are labelled with the following symbol:

!Caution

Electrostatic sensitive devices are subject to voltages that are far below thevoltage values that can still be perceived by human beings. These voltagesare present if you touch a component or module without previously beingelectrostatically discharged. In most cases, the damage caused by an over-voltage is not immediately noticeable and results in total damage only after aprolonged period of operation.

Definition

Guidelines for Handling Electrostatic Sensitive Devices (ESD)

B


B.2 Electrostatic Charging of Objects and Persons

Every object with no conductive connection to the electrical potential of itssurroundings can be charged electrostatically. In this way, voltages up to15 000 V can build up whereas minor charges, i.e. up to 100 V, are not rele-vant.

Examples:

Plastic covers up to 5 000 V

Plastic cups up to 5 000 V

Plastic-bound books and notebooks up to 8 000 V

Desoldering device with plastic parts up to 8 000 V

Walking on plastic flooring up to 12 000 V

Sitting on a padded chair up to 15 000 V

Walking on a carpet (synthetic) up to 15 000 V

An electrostatic discharge is

perceptible from 3500 V

audible from 4500 V

visible from 5000 V

A fraction of these voltages is capable of destroying or damaging electronicdevices.

Carefully note and apply the protective measures described below to protectand prolong the life of your modules and components.

ElectrostaticCharging

Limits forPerceivingElectrostaticDischarges


B


C79000-G7076-C623-01

B.3 General Protective Measures Against Electrostatic DischargeDamage

Keep plastics away from sensitive devices. Most plastic materials have a ten-dency to build up electrostatic charges easily.

Make sure that the personnel, working surfaces and packaging are suffi-ciently grounded when handling electrostatic sensitive devices.

If possible, avoid any contact with electrostatic sensitive devices. Hold mod-ules without touching the pins of components or printed conductors. In thisway, the discharged energy cannot affect the sensitive devices.

Note the following measures that have to be taken for modules that are notprotected against accidental contact:

Touch electrostatic sensitive devices only

– if you wear a wristband complying with ESD specifications or

– if you use special ESD footwear or ground straps when walking on anESD floor.

Persons working on electronic devices should first discharge their bodiesby touching grounded metallic parts (e.g. bare metal parts of switchgearcabinets, water pipes, etc.).

Protect the modules against contact with chargeable and highly insulatingmaterials, such as plastic foils, insulating table tops or clothes made ofplastic fibres.

Place electrostatic sensitive devices only on conductive surfaces:

– Tables with ESD surface

– Conductive ESD foam plastic (ESD foam plastic is mostly colouredblack)

– ESD bags

Avoid direct contact of electrostatic sensitive devices with visual displayunits, monitors or TV sets (minimum distance to screen > 10 cm).

Keep Plasticsaway

Provide SufficientGrounding

Avoid any Contact

AdditionalPrecautions forModules withoutHousings


B


The following Figure once again illustrates the precautions for handling elec-trostatically sensitive devices.

a Conductive flooring material

b Table with conductive, grounded surface

c ESD footwear

d ESD smock

e Grounded ESD wristband

f Ground connection of switchgear cabinet

g Grounded chair

a

b

c

d

e

fg

ESD Precautions


B


C79000-G7076-C623-01

B.4 Taking Measurements and Working on ESD Modules

Measurements may be taken on electrostatic sensitive devices only if

the measuring device is grounded (e.g. via protective conductor) or

the tip of the isolated measuring device has previously been discharged(e.g. by briefly touching grounded metal parts).

B.5 Packing Electrostatic Sensitive Devices

Generally use conductive materials for packing modules without casing andcomponents. You may also use metal-clad plastics boxes or metal cans. Al-ways store ESD modules in conductive packing material.

When packing modules incorporating batteries, cover the battery connectionswith insulating tape or insulating material to avoid short-circuiting of thebattery. Remove the battery, if possible.

Use GroundedMeasuring DevicesOnly

Using ConductiveMaterial forPacking Moduleswithout Casing

Cover Batteries


Glossary-1C7–623, C7–624 Control SystemsC79000-G7076-C623-01

Glossary

Glossary-2C7–623, C7–624 Control Systems

C79000-G7076-C623-01

A

Analog input/output modules convert analog process values (for example,temperatures) into digital values that can be further processed by the C7 CPUor they convert digital values into analog manipulated variables.

B

The backup battery guarantees that the user program in the C7 CPU isstored safe from power failures and that data areas, memory bits, timers andcounters remain retentive.

The backup memory guarantees backup of memory areas of the C7-620without a backup battery. A programmable number of timers, counters,memory bits and data bytes, the retentive timers, counters, memory bits anddata bytes are backed up.

Speed at which data are transmitted (transmission rate in bit/s).

A bus is a transmission medium that connects two or more nodes with eachother. Data transmission can be serial or parallel, over electrical conductorsor fiber optic cable.

C

The C7-620 complete system comprises a S7-300 CPU, a COROS OP, I/Oand an IM 360 interface module, all integrated in one unit.

The C7 CPU (central processing unit) contains the controller and arithmeticunit, memory, operating system and programming ports. The C7 CPU is de-pendent on the C7 OP. The C7 CPU has its own MPI address and is con-nected with the C7 OP via the MPI.

The C7 I/O ( signal module) forms the interface between the process andthe programmable controller. It provides digital input and output signals aswell as analog input and output signals. The integral universal inputs havespecial functions in the C7 (interrupt/counter inputs).

AnalogInput/OutputModule

Backup Battery

Backup Memory

Baud rate

Bus

C7-620

C7 CPU

C7 I/O

Glossary


The C7 OP handles the OP functions of the C7. It is independent of the

C7 CPU and continues to operate if, for example, the C7 CPU goes to theSTOP mode. The C7 OP has its own MPI address and is connected to the C7CPU via the MPI.

Chassis ground is the totality of all connected inactive parts of an operatingresource that cannot carry a hazardous touch voltage even in the event of afault.

Communications processors are modules for point-to-point links and for buslinks.

When a C7 CPU is restarted (for example, after selection of one of the C7CPU Operating Modes in the System Functions menu or on switching themains power ON), the organization block OB 100 (complete restart) isexecuted before cyclic program execution (OB1). At complete restart, theprocess image of the inputs is read in and the STEP 7 user program isexecuted starting at the first instruction in OB1.

Assignment of modules to mounting racks/slots and addresses (in the case ofsignal modules, for example).

The configuration memory is a flash memory containing the configurationdata and integrated in the C7 OP.

Communications processors (CPs) are intelligent modules with their ownprocessor. They form an important group within the components of a pro-grammable controller. We differentiate between various types of communica-tions processors according to their tasks, for example, CPs for signaling andlisting, for point-to-point connection, for the operator interface (COROS), forbus connections (SINEC) and for diagnostics and mass storage applications.

The cycle time is the time required by the C7 to execute the user pro-gram once.

D

Diagnostics functions, System diagnostics

The diagnostics buffer is a buffered memory area in the C7 CPU in whichdiagnostics events are stored in order of occurrence.

C7 OP

Chassis Ground

CommunicationsProcessor

Complete Restart

Configuration

ConfigurationMemory

CP

Cycle Time

Diagnostics

Diagnostics Buffer

Glossary


C79000-G7076-C623-01

Diagnostics events include errors in a digital function in the C7, system faultsin the C7 caused, for example, by programming errors or operating modetransitions.

The diagnostics functions encompass the entire system diagnostics and in-clude the detection, evaluation and signaling of faults within the C7.

Modules with diagnostics capability signal detected system errors to the

C7 CPU via diagnostics interrupts.

E

Electrical connection (equipotential bonding conductor) that brings the bo-dies of electrical resources to the same or approximately the same potentialas foreign conducting bodies in order to prevent interference or hazardousvoltages arising between the bodies.

Error display is one of the possible responses of the operating system to run-time errors. The other possible responses are: Error response in the user pro-gram, STOP status of the C7 CPU.

F

FEPROMs correspond in their function to the electrically-erasableEEPROMs but they can be erased significantly faster (FEPROM = flash eras-able programmable read-only memory)

The following data can be stored in a flash EPROM safe from power failure:

The user program

The parameters that determine the behavior of the C7 CPU and theI/O functions of the C7.

Flash EPROM

DiagnosticsEvents

DiagnosticsFunctions

DiagnosticsInterrupt

EquipotentialBonding

Error display

Flash EPROM

Flash Memory

Glossary


An FM (function module) is a module that offloads the CPU of the S7-300and S7-400 programmable controllers of time-critical or memory-intensiveprocess signal handling tasks. FMs generally use the internal bus for high-speed data exchange with the CPU. Examples of FM applications includecounting, positioning, closed-loop control.

Grounding with the sole purpose of ensuring the intended purpose of theelectrical resources. Function grounding has the effect of short-circuiting in-terference voltages that would otherwise have impermissible influence on theresources.

G

Conductive ground whose electrical potential at every point can be taken aszero.

In the area of grounding electrodes, ground can have a potential different tozero. This is frequently referred to as “reference ground”.

To connect an electrically conductive part with the grounding electrode (oneor more conductive parts that have very good contact to ground) via agrounding point.

I

The STEP 7 info functions offer you the possibility of displaying status in-formation on the programming device via the connected C7 during the differ-ent phases of startup and during operation of a programmable controller.

MPI

The operating system of the C7 CPU recognizes 10 different priorityclasses governing execution of the user program. Interrupts such as processinterrupts belong to these priority classes. When an interrupt occurs, the op-erating system automatically calls an assigned organization block in whichthe user can program the desired response (for example, in an FB).

In isolated input/output modules, the reference potentials of the control cir-cuit and the load circuit are galvanically isolated by, for example, optocoup-lers, relay contactors or transformers. Input/output circuits can be connectedto common potential.

FM

FunctionGrounding

Ground

Ground (verb)

Info Function

Interface,multipoint

Interrupt

Isolated

Glossary


C79000-G7076-C623-01

L

The load memory is a component part of the C7 CPU. It contains objects(load objects) created by the programming device. It is implemented as afixed integrated memory.

M

When clearing the C7 CPU, the following memories are deleted:

The work memory

The read/write memory area of the load memory

The system memory

The backup memory

and the user program is reloaded from the flash memory.

When clearing the C7 OP, the following memories are deleted:

The work memory

The configuration memory

The C7 OP then does not contain a user configuration.

The multipoint interface (MPI) is the programming device port of SIMATICS7. It enables simultaneous operation of several nodes (programming de-vices, text displays, operator panels) on one or several CPUs. The nodes onthe MPI are connected to each other via a network. Each node is identifiedby a unique address (MPI address).

A network is a connection of several C7s and/or S7-300s and further termi-nals, such as a programming device, over a connecting cable. Data areexchanged between the connected devices over the network.

Load Memory

Memory Reset

MPI

MPI Network

Glossary


N

The node number represents the “access address” of a C7 CPU, C7 OP or aprogramming or other intelligent I/O module when it communicates withother nodes over an MPI network. The node number is assigned to the C7CPU, C7 OP and programming.

In non-isolated input/output modules, the reference potentials of the controlcircuit and the load circuit are electrically connected.

O

The operating system of the C7 CPU organizes all functions and sequences ofthe C7 CPU that are not connected with a special control task.

P

1. Variable of a STEP 7 code block2. Variable for setting the behavior of a module (one or more per module).Each module is supplied from the factory with a meaningful basic setting thatcan be modified using the STEP 7 tool S7 Configuration.There are static parameters and dynamic parameters.

Parameterization refers to the setting of the behavior of a module.

In contrast to static parameters, dynamic module parameters can be modifiedduring operation by calling an SFC in the user program, for example, limitvalues of an analog signal input module.

In contrast to dynamic parameters, static module parameters cannot be modi-fied via the user program. They can only be modified via the software tool S7Configuration, for example input delay of a digital signal input module.

Programming device

Programmable controller

Node Number

Non-Isolated

Operating Systemof the C7 CPU

Parameter

Parameterization

Parameters,Dynamic

Parameters, Static

PG

PLC

Glossary


C79000-G7076-C623-01

The signal states of the digital inputs and outputs are stored in the C7 CPU ina process image. We differentiate between the process-image input table (PII)and the process-image output table (PIQ).

The process-image input table is read by the input modules before executionof the user program.

The process-image output table is transferred to the output modules by theoperating system at the end of the user program.

A process interrupt is triggered by interrupt-triggering modules as the resultof certain events in the process. The process interrupt is signaled to the C7CPU. Depending on the priority of the interrupt, the corresponding organiza-tion block is then executed.

An automation system of the SIMATIC S7 range.

Programmable controllers (PLCs) are electronic controllers whose function isstored as a program in the CPU. The design and wiring of these devicestherefore does not depend on the controller function. The programmable con-troller has the structure of a computer; it consists of a CPU with memory,inputs and outputs and an internal bus system. The I/O and the programminglanguage are designed specifically for the requirements of control engineer-ing.

Programming devices are essentially personal computers that are compactand portable and suitable for use in industry. They are characterized by beingequipped with special hardware and software for SIMATIC programmablecontrollers.

R

Random access memory is a read/write memory in which each memory cellcan be addressed individually and can be changed. RAM memories are usedas data memories and program memories

Ground

Potential from which the voltages of the connected circuits are consideredand/or measured.

Process Image

Process Interrupt

ProgrammableController

ProgrammingDevice

RAM

Reference Ground

ReferencePotential

Glossary


S

Signal modules (C7 I/O) form the interface between the process and the C7.There are digital input and output modules and analog input and output mod-ules.

Programming software for creating user programs for SIMATIC S7 program-mable controllers.

A STEP 7 tool is a tool of STEP 7 tailored to a specific task.

Substitute values are values that are output to the process or used in the userprogram in place of a process value in the event of a fault occurring in signalmodules. The substitute values can be specified by the user (for example,keep old value).

System diagnostics includes the detection, evaluation and signaling of faultsoccurring within the programmable controller. Examples of such faults in-clude program errors or module failures. System faults can be displayed viaLEDs or using the S7 Information tool.

The system memory is integrated on the CPU and implemented in the formof a RAM. The address areas (for example, timers, counters, memory bits)and the data areas required internally by the operating system (for example,buffers for communications) are stored in the system memory.

T

The time-delay interrupt belongs to one of the priority classes in programexecution on the C7 CPU. It is generated after expiry of a time started in theuser program. The relevant organization block is then executed.

A timed interrupt is generated periodically by the C7 CPU according to aparameterizable time grid. It triggers execution of the relevant organizationblock.

The time-of-day interrupt belongs to one of the priority classes in programexecution on the C7 CPU. It is generated dependent on a specific date (ordaily) and time (for example, 9:50 or hourly, by the minute). The relevantorganization block is then executed.

Signal Module

STEP 7

STEP 7 Tool

Substitute Value

SystemDiagnostics

System Memory

Time-DelayInterrupt

Timed Interrupt

Time-of-DayInterrupt

Glossary


C79000-G7076-C623-01

STEP 7 tool

Sum of the currents of all output channels of a digital output module.

U

Without galvanic connection to ground

The user memory contains the code and data blocks of the user program. Theuser memory is integrated into the C7 CPU as a flash memory. However, theuser program is executed in the work memory of the C7 CPU.

The user program contains all the statements and declarations as well as datafor signal processing by which a plant or process can be controlled. It is as-signed to a programmable module (for example, C7 CPU, FM) and can bestructured in smaller units (blocks).

V

Voltage-dependent resistor

W

The work memory is a RAM in the C7 620 that the processor uses to ac-cess the user program during program execution.

Tool

Total Current

Ungrounded

User Memory

User Program

Varistor

Work Memory

Glossary

Index-1C7–623, C7–624 Control SystemsC79000-G7076-C623-01

Index

Figures24 VDC input, 2-14368 connecting cable, 2-214–wire transducer

Connection, 6-6Measuring ranges, 6-10

AAccessories, 2-2Analog input

Isolated, 6-3measuring ranges, 6-10

Analog input function, 6-10Technical specifications, 6-14

Analog input moduleCharacteristics, 6-11Technical specifications, 6-11Terminal connection diagram, 6-12

Analog input module SM 331; AI 8, Wire breakcheck, 6-10

Analog inputs/outputs, 2-12Analog output function, 6-16

Technical specifications, 6-18Terminal connection diagram, 6-17

Analog signal, Cable for, 6-3, 6-7AUX digital inputs, 2-12

BBackup battery

Change, 8-2Disposal, 8-4Storage, 8-4Transport and storage conditions, A-7

BAF, 2-27Battery fault, 2-27Baud rate, 3-2Bus cable, 1-5

Bus connector, 3-10Installing PROFIBUS bus cable, 3-16mount bus cable, 3-13Purpose, 3-12Remove, 3-18Set terminating resistance, 3-18Terminating resistance, 3-5to module, 3-18

Bus connectors, 2-15

CC7

Installation, 2-6Performance range, 1-3

C7 Accessories, 2-2C7 CPU, Glossary-2

clearing, 2-24Clock, 2-22

C7 gap, 2-9C7 OP, Glossary-3

Clock, 2-22Cabinet setup, 2-16Cable

for analog signal, 6-3for analog signals, 6-7

Cable lengthMaximum, 3-8of an MPI network, 3-8

CE marking, A-5Clearing, C7 CPU, 2-24Clock

C7 CPU, 2-22Master, 2-22OP section, 2-22

Communication, CPU-CPU, 3-3Communications processors, 1-4Components, for MPI network, 3-5, 3-10Configuration Memory, Glossary-3Connect PG/PC, for service purposes, 4-4

Index-2C7–623, C7–624 Control Systems

C79000-G7076-C623-01

Connectable components, for C7, 1-4Connectors, 2-19Counter input, Universal inputs, 7-2, 7-3CPU-CPU communication, 3-3Current measurement, 6-10Current transducer, 6-3

DDI/DO 24VDC power supply, 2-13DI/DO status display, 5-8

Exit, 5-9Select, 5-8

Digital input, Universal inputs, 7-2, 7-3Digital input function, Technical specifications,

5-4Digital inputs, 2-10Digital output function, 5-5

Special features, 5-5Digital outputs, 2-11

FFixing bracket

before engaging, 2-7insert, 2-8

Flash EPROM, Glossary-4Flash Memory, Glossary-4FM–Approval, A-4FRCE, 2-27Frequency counter, Universal inputs, 7-3Frequency measurement, Universal inputs, 7-2Function keys, Labeling, 2-4Function modules, 1-4Functional Earth, 2-14

GGap, C7, 2-9GD circuit, 3-3Global data, 3-3Grounding, 2-16Grounding rail, 2-16

Installing, 2-18Group error, CPU, 2-27

HHighest MPI address, 3-2

IIM360, 2-20IM360 interface module, 2-20IM361 cable, 2-2, 2-15Installation, interference-proof, 2-16Installing a C7, 2-6Interface module, 1-4, 2-20Interference signals, 2-16Interference-proof installation, 2-16Interrupt input, Universal inputs, 7-2, 7-3

KKeying Connectors, 2-19

MMaster clock, 2-22Measuring ranges, analog input, 6-10Modules, Transport and storage conditions, A-7Mount bus cable, to bus connector with order

no. 6ES7 ..., 3-13MPI, 3-2

Pin assignments, 2-14MPI address, 3-2

Highest, 3-2of FMs and CPs, 3-3of the C7, 3-3Recommendation, 3-5Rules, 3-3

MPI networkCable length, 3-8Components, 3-5, 3-10Connecting a PG, 4-2, 4-3Example for configuring, 3-7Rules for configuring, 3-4Spur lines, 3-8

NNetwork components, 3-10Nodes, 3-2

Number, 3-2

OOP, 1-5Operating hours counter, 2-23

Index

Index-3C7–623, C7–624 Control SystemsC79000-G7076-C623-01

PParameterizing, Universal inputs, 7-3Performance range, C7, 1-3Period duration counter, Universal inputs, 7-2,

7-3PG

Connection to an MPI network, 4-2, 4-3in MPI network, 4-4

PG/PC, via spur line to MPI network, 4-5Pin assignments, 2-10Plug and socket connectors, View, 2-10Printer, 1-5Printer cable, 2-3Printer connection, 2-10PROFIBUS bus cable, 2-15, 3-10

Characteristics, 3-10Rules for cable laying, 3-11to bus connector, 3-16

PROFIBUS bus terminal, 2-15Programming device, 1-5Programming device cable, 1-5, 2-15

RRemote segment, 3-8, 3-9RS 485 repeater, 1-5, 3-10

Terminating resistance, 3-6Using, 3-5

RUN, 2-27

SS7-300 (CPU), 1-4S7-400 (CPU), 1-5Setup guidelines, 2-16SF, 2-27Shield, 2-16Shielding clips, 2-18

Signal modules, 1-4Spur lines, 3-4, 3-8Status display, DI/DO, 5-8STOP, 2-27Storage, Backup batteries, 8-4Surge impedance. Siehe Abschlußwiderstand

TTerminating resistance, 3-4, 3-5

Example, 3-6on bus connector, 3-5on RS 485 repeater, 3-6Set at the bus connector, 3-18

TransducerIsolated, 6-4Non–isolated, 6-5

UUniversal inputs

Parameterizing, 7-3Pin assignments, 7-3Technical specifications, 7-4

VV24, 2-13Voltage measurement, 6-10Voltage transducer, 6-3

Connection, 6-6

WWire break check, Analog input module SM

331; AI 8, 6-10

Index

Index-4C7–623, C7–624 Control Systems

C79000-G7076-C623-01

Index

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